Examples with solutions for Addition of Fractions: In combination with other operations

Exercise #1

(14+745414)10:7:5=? (\frac{1}{4}+\frac{7}{4}-\frac{5}{4}-\frac{1}{4})\cdot10:7:5=\text{?}

Video Solution

Step-by-Step Solution

Let's simplify this expression while following the order of operations which states that exponents come before multiplication and division, which come before addition and subtraction, and that parentheses come before all of these,

Therefore, we'll start by simplifying the expressions in parentheses first:
(14+745414)10:7:5=1+751410:7:5=2410:7:5=1210:7:5 (\frac{1}{4}+\frac{7}{4}-\frac{5}{4}-\frac{1}{4})\cdot10:7:5=\\ \frac{1+7-5-1}{4}\cdot10:7:5 =\\ \frac{2}{4}\cdot10:7:5 = \\ \frac{1}{2}\cdot10:7:5

We calculated the expression inside the parentheses by adding the fractions, which we did by creating one fraction using the common denominator (4) which in this case is the denominator in all fractions, so we only added/subtracted the numerators (according to the fraction sign), then we reduced the resulting fraction,

We'll continue and note that between multiplication and division operations there is no defined precedence for either operation, therefore we'll calculate the result of the expression obtained in the last step step by step from left to right (which is the regular order in arithmetic operations), meaning we'll first perform the multiplication operation, which is the first from the left, and then we'll perform the division operation that comes after it, and so on:

1210:7:5=1102:7:5=102:7:5=5:7:5=57:5 \frac{1}{2}\cdot10:7:5 =\\ \frac{1\cdot10}{2}:7:5 =\\ \frac{10}{2}:7:5 =\\ 5:7:5 =\\ \frac{5}{7}:5

In the first step, we performed the multiplication of the fraction by the whole number, remembering that multiplying by a fraction means multiplying by the fraction's numerator, then we simplified the resulting fraction and reduced it (effectively performing the division operation that results from it), in the final step we wrote the division operation as a simple fraction, since this division operation yields a non-whole result,

We'll continue and to perform the final division operation, we'll remember that dividing by a number is the same as multiplying by its reciprocal, and therefore we'll replace the division operation with multiplication by the reciprocal:

57:5=5715 \frac{5}{7}:5 =\\ \frac{5}{7}\cdot\frac{1}{5}

In this case we preferred to multiply by the reciprocal because the divisor in the expression is a fraction and it's more convenient to perform multiplication between fractions,

We will then perform the multiplication between the fractions we got in the last step, while remembering that multiplication between fractions is performed by multiplying numerator by numerator and denominator by denominator while maintaining the fraction line, then we'll simplify the resulting expression by reducing it:

5715=5175=535=17 \frac{5}{7}\cdot\frac{1}{5} =\\ \frac{5\cdot1}{7\cdot5}=\\ \frac{5}{35}=\\ \frac{1}{7}

Let's summarize the solution steps, we got that:

(14+745414)10:7:5=1+751410:7:5=1210:7:5=5:7:5=5715=17 (\frac{1}{4}+\frac{7}{4}-\frac{5}{4}-\frac{1}{4})\cdot10:7:5=\\ \frac{1+7-5-1}{4}\cdot10:7:5 =\\ \frac{1}{2}\cdot10:7:5 =\\ 5:7:5 =\\ \frac{5}{7}\cdot\frac{1}{5} =\\ \frac{1}{7}

Therefore the correct answer is answer B.

Answer

17 \frac{1}{7}

Exercise #2

1228+14= \frac{1}{2}-\frac{2}{8}+\frac{1}{4}=

Step-by-Step Solution

To solve the expression 1228+14 \frac{1}{2} - \frac{2}{8} + \frac{1}{4} , we must first find a common denominator for the fractions involved.

Step 1: Identify a common denominator. The denominators are 2, 8, and 4. The smallest common multiple of these numbers is 8.

Step 2: Convert each fraction to have the common denominator of 8.

  • The fraction 12 \frac{1}{2} can be written as 48 \frac{4}{8} because 1×4=4 1 \times 4 = 4 and 2×4=8 2 \times 4 = 8 .
  • The fraction 28 \frac{2}{8} is already expressed with 8 as the denominator.
  • The fraction 14 \frac{1}{4} can be written as 28 \frac{2}{8} because 1×2=2 1 \times 2 = 2 and 4×2=8 4 \times 2 = 8 .

Step 3: Substitute these equivalent fractions back into the original expression:

4828+28 \frac{4}{8} - \frac{2}{8} + \frac{2}{8}

Step 4: Perform the subtraction and addition following the order of operations:

  • Subtract: 4828=28 \frac{4}{8} - \frac{2}{8} = \frac{2}{8}
  • Add: 28+28=48 \frac{2}{8} + \frac{2}{8} = \frac{4}{8}

Step 5: Simplify the result:

48 \frac{4}{8} simplifies to 12 \frac{1}{2} by dividing the numerator and denominator by 4.

Therefore, the value of the expression is 12 \frac{1}{2} .

Answer

12 \frac{1}{2}

Exercise #3

23+21545= \frac{2}{3}+\frac{2}{15}-\frac{4}{5}=

Video Solution

Step-by-Step Solution

Let's try to find the lowest common denominator between 3, 15, and 5

To find the lowest common denominator, we need to find a number that is divisible by 3, 15, and 5

In this case, the common denominator is 15

Now we'll multiply each fraction by the appropriate number to reach the denominator 15

We'll multiply the first fraction by 5

We'll multiply the second fraction by 1

We'll multiply the third fraction by 3

2×53×5+2×115×14×35×3=1015+2151215 \frac{2\times5}{3\times5}+\frac{2\times1}{15\times1}-\frac{4\times3}{5\times3}=\frac{10}{15}+\frac{2}{15}-\frac{12}{15}

Now we'll add and then subtract:

10+21215=121215=015 \frac{10+2-12}{15}=\frac{12-12}{15}=\frac{0}{15}

We'll divide both the numerator and denominator by 0 and get:

015=0 \frac{0}{15}=0

Answer

0 0

Exercise #4

13+71525= \frac{1}{3}+\frac{7}{15}-\frac{2}{5}=

Video Solution

Step-by-Step Solution

Let's try to find the lowest common denominator between 3, 15, and 5

To find the lowest common denominator, we need to find a number that is divisible by 3, 15, and 5

In this case, the common denominator is 15

Now we'll multiply each fraction by the appropriate number to reach the denominator 15

We'll multiply the first fraction by 5

We'll multiply the second fraction by 1

We'll multiply the third fraction by 3

1×53×5+7×115×12×35×3=515+715615 \frac{1\times5}{3\times5}+\frac{7\times1}{15\times1}-\frac{2\times3}{5\times3}=\frac{5}{15}+\frac{7}{15}-\frac{6}{15}

Now we'll add and then subtract:

5+7615=12615=615 \frac{5+7-6}{15}=\frac{12-6}{15}=\frac{6}{15}

We'll divide both numerator and denominator by 3 and get:

6:315:3=25 \frac{6:3}{15:3}=\frac{2}{5}

Answer

25 \frac{2}{5}

Exercise #5

35+15315= \frac{3}{5}+\frac{1}{5}-\frac{3}{15}=

Video Solution

Step-by-Step Solution

To solve this problem, we'll perform the following steps:

  • Step 1: Determine a common denominator for the fractions.
  • Step 2: Convert each fraction to have this common denominator.
  • Step 3: Perform the addition and subtraction operations on these fractions.
  • Step 4: Simplify the resulting fraction, if possible.

Now, let's work through each step:

Step 1: To combine 35 \frac{3}{5} , 15 \frac{1}{5} , and 315 \frac{3}{15} , identify the least common denominator (LCD). The denominators here are 5, 5, and 15. The least common multiple of 5 and 15 is 15. Therefore, our common denominator is 15.

Step 2: Convert each fraction to an equivalent fraction with a denominator of 15:
35=3×35×3=915\frac{3}{5} = \frac{3 \times 3}{5 \times 3} = \frac{9}{15},
15=1×35×3=315\frac{1}{5} = \frac{1 \times 3}{5 \times 3} = \frac{3}{15},
315\frac{3}{15} is already with the common denominator.

Step 3: Add and subtract the fractions:
915+315=1215 \frac{9}{15} + \frac{3}{15} = \frac{12}{15}
1215315=915 \frac{12}{15} - \frac{3}{15} = \frac{9}{15} .

Step 4: Simplify the resulting fraction:
915=35\frac{9}{15} = \frac{3}{5} (dividing the numerator and denominator by their greatest common divisor, which is 3).

Therefore, the solution to the problem is 35 \frac{3}{5} .

Answer

35 \frac{3}{5}

Exercise #6

3515+315= \frac{3}{5}-\frac{1}{5}+\frac{3}{15}=

Video Solution

Step-by-Step Solution

To solve this problem, we will follow these steps:

  • Step 1: Find the least common denominator (LCD) for the fractions.
  • Step 2: Convert each fraction to an equivalent fraction with the common denominator.
  • Step 3: Perform the operations in the given order, subtraction first, then addition.

Now, let's work through each step:

Step 1: The denominators of the given fractions are 5 and 15. The least common multiple (LCM) of these numbers is 15, so 15 will be our common denominator.

Step 2: Convert each fraction to have the denominator of 15:
- 35\frac{3}{5} is converted by multiplying both the numerator and denominator by 3, resulting in 915\frac{9}{15}.
- 15\frac{1}{5} is converted by multiplying both the numerator and denominator by 3, yielding 315\frac{3}{15}.
- 315\frac{3}{15} is already in terms of the common denominator.

Step 3: Perform the subtraction and addition:
- Start by subtracting 315\frac{3}{15} from 915\frac{9}{15}:

915315=615\frac{9}{15} - \frac{3}{15} = \frac{6}{15}

Now, add 615\frac{6}{15} and 315\frac{3}{15}:

615+315=915\frac{6}{15} + \frac{3}{15} = \frac{9}{15}

Finally, simplify 915\frac{9}{15} by dividing the numerator and denominator by their greatest common divisor, which is 3:

915=35\frac{9}{15} = \frac{3}{5}

Therefore, the solution to the problem is 35\frac{3}{5}.

Answer

35 \frac{3}{5}

Exercise #7

3624+112= \frac{3}{6}-\frac{2}{4}+\frac{1}{12}=

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Simplify each fraction.

  • Identify the least common denominator (LCD).

  • Convert each fraction to have this common denominator.

  • Perform the addition and subtraction.

  • Simplify the final result.

Let's work through each step:
Step 1: Simplify each fraction.
- 36\frac{3}{6} simplifies to 12\frac{1}{2} because both the numerator and denominator are divisible by 3.
- 24\frac{2}{4} simplifies to 12\frac{1}{2} because both the numerator and denominator are divisible by 2.
- 112\frac{1}{12} is already in its simplest form.

Step 2: Identify the least common denominator (LCD).
- The denominators now are 2, 2, and 12. The LCD of 2 and 12 is 12.

Step 3: Convert each fraction to have this common denominator.
- 12=612\frac{1}{2} = \frac{6}{12} (since 1×6=61 \times 6 = 6 and 2×6=122 \times 6 = 12)
- 12=612\frac{1}{2} = \frac{6}{12} (similarly converted)
- 112=112\frac{1}{12} = \frac{1}{12} (already has the denominator 12)

Step 4: Perform the addition and subtraction:
612612+112=66+112=112\frac{6}{12} - \frac{6}{12} + \frac{1}{12} = \frac{6 - 6 + 1}{12} = \frac{1}{12}

Step 5: Simplify the final result:
The result 112\frac{1}{12} is already in its simplest form.

Therefore, the solution to the problem is 112\frac{1}{12}.

Answer

112 \frac{1}{12}

Exercise #8

36+24112= \frac{3}{6}+\frac{2}{4}-\frac{1}{12}=

Video Solution

Step-by-Step Solution

To solve the problem, follow these steps:

  • Step 1: Convert each fraction to have a common denominator.
  • Step 2: Add and subtract the fractions.
  • Step 3: Simplify the result.

Let's work through these steps:

Step 1: Find the Least Common Denominator (LCD) of the fractions involved. The denominators are 6, 4, and 12. The LCM of these numbers is 12, so the LCD is 12.

Convert each fraction to this common denominator:

  • 36 \frac{3}{6} becomes 3×26×2=612\frac{3 \times 2}{6 \times 2} = \frac{6}{12}
  • 24 \frac{2}{4} becomes 2×34×3=612\frac{2 \times 3}{4 \times 3} = \frac{6}{12}
  • 112 remains 112 \frac{1}{12} \text{ remains } \frac{1}{12}

Step 2: Perform the operations using these equivalent fractions: 612+612112=6+6112=1112 \frac{6}{12} + \frac{6}{12} - \frac{1}{12} = \frac{6 + 6 - 1}{12} = \frac{11}{12}

Step 3: Check if the result can be simplified further. In this case, 1112 \frac{11}{12} is already in simplest form.

Therefore, the solution to the problem is 1112 \frac{11}{12} .

Answer

1112 \frac{11}{12}

Exercise #9

1434+12+510= \frac{1}{4}-\frac{3}{4}+\frac{1}{2}+\frac{5}{10}=

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Simplify fractions if possible.
  • Convert fractions to have a common denominator.
  • Perform the operations in order, while considering appropriate signs.

Let's proceed step-by-step:

First, notice that 510\frac{5}{10} simplifies to 12\frac{1}{2}, as both the numerator and denominator can be divided by 5.
Scheme now becomes:

1434+12+12 \frac{1}{4} - \frac{3}{4} + \frac{1}{2} + \frac{1}{2}

Convert all fractions to have a denominator of 4:

  • 14\frac{1}{4} remains 14\frac{1}{4}.
  • 34\frac{3}{4} remains 34\frac{3}{4}.
  • 12\frac{1}{2} becomes 24\frac{2}{4}.

Our new expression is:

1434+24+24 \frac{1}{4} - \frac{3}{4} + \frac{2}{4} + \frac{2}{4}

Perform the operations in left to right:

1434=24 \frac{1}{4} - \frac{3}{4} = -\frac{2}{4} which simplifies to 12-\frac{1}{2}

Now, combine with the next term:

12+24=0-\frac{1}{2} + \frac{2}{4} = 0

Lastly, add the remaining term:

0+24=120 + \frac{2}{4} = \frac{1}{2}

Therefore, the solution to the problem is 12\frac{1}{2}.

Thus, the correct answer is 12 \frac{1}{2} , and it corresponds to choice 3.

Answer

12 \frac{1}{2}

Exercise #10

Solve the following exercise:

6712+314=? \frac{6}{7}-\frac{1}{2}+\frac{3}{14}=\text{?}

Video Solution

Step-by-Step Solution

To solve the expression 6712+314 \frac{6}{7} - \frac{1}{2} + \frac{3}{14} , we will follow these steps:

  • Step 1: Find a common denominator for the fractions.
  • Step 2: Convert each fraction to the common denominator.
  • Step 3: Perform the subtraction and addition as required.
  • Step 4: Simplify the result, if possible.

Let's work through the steps:

Step 1: The denominators are 7, 2, and 14. The least common multiple (LCM) of these numbers is 14.

Step 2: Convert each fraction:

  • 67 \frac{6}{7} becomes 6×27×2=1214 \frac{6 \times 2}{7 \times 2} = \frac{12}{14} .
  • 12 \frac{1}{2} becomes 1×72×7=714 \frac{1 \times 7}{2 \times 7} = \frac{7}{14} .
  • 314 \frac{3}{14} is already in the correct form as 314 \frac{3}{14} .

Step 3: Perform the operations:

  • Subtract: 1214714=514 \frac{12}{14} - \frac{7}{14} = \frac{5}{14} .
  • Add: 514+314=814 \frac{5}{14} + \frac{3}{14} = \frac{8}{14} .

Step 4: Simplify the fraction if possible. Here, 814 \frac{8}{14} simplifies to 47 \frac{4}{7} ; however, since the given choices list 814 \frac{8}{14} and it matches, there is no need for further simplification within the context of this question.

Therefore, the solution to the problem is 814 \frac{8}{14} .

Answer

814 \frac{8}{14}

Exercise #11

Solve the following exercise:

27+12714=? \frac{2}{7}+\frac{1}{2}-\frac{7}{14}=\text{?}

Video Solution

Step-by-Step Solution

To solve the expression 27+12714 \frac{2}{7}+\frac{1}{2}-\frac{7}{14} , follow these steps:

  • Step 1: Find the least common multiple (LCM) of the denominators 7, 2, and 14. The LCM is 14.
  • Step 2: Convert each fraction to have the denominator of 14:
        27 \frac{2}{7} becomes 2×27×2=414 \frac{2 \times 2}{7 \times 2} = \frac{4}{14}
        12 \frac{1}{2} becomes 1×72×7=714 \frac{1 \times 7}{2 \times 7} = \frac{7}{14}
        714 \frac{7}{14} remains 714 \frac{7}{14} since it's already over 14.
  • Step 3: Perform the operations in the expression 414+714714 \frac{4}{14} + \frac{7}{14} - \frac{7}{14} :
        First, add 414+714=1114 \frac{4}{14} + \frac{7}{14} = \frac{11}{14} .
        Then, subtract 1114714=414 \frac{11}{14} - \frac{7}{14} = \frac{4}{14} .
  • Step 4: The result is already simplified. Thus, the solution to the problem is 414 \frac{4}{14} .

Therefore, the solution to the problem is 414 \mathbf{\frac{4}{14}} , which corresponds to choice 3 \mathbf{3} .

Answer

414 \frac{4}{14}

Exercise #12

Solve the following exercise:

25+1213=? \frac{2}{5}+\frac{1}{2}-\frac{1}{3}=\text{?}

Video Solution

Step-by-Step Solution

To solve the problem 25+1213\frac{2}{5} + \frac{1}{2} - \frac{1}{3}, we will follow these steps:

  • Step 1: Find the least common denominator (LCD) for 25\frac{2}{5}, 12\frac{1}{2}, and 13\frac{1}{3}.
  • Step 2: Convert each fraction to have this common denominator.
  • Step 3: Perform the arithmetic operations.
  • Step 4: Simplify the result if necessary.

Now, let's proceed with the solution:
Step 1: The denominators are 5, 2, and 3. The least common multiple of these numbers is 30. Thus, the LCD is 30.

Step 2: Convert each fraction to have the common denominator of 30:
- Convert 25\frac{2}{5} to a fraction with denominator 30: 25=2×65×6=1230\frac{2}{5} = \frac{2 \times 6}{5 \times 6} = \frac{12}{30}.
- Convert 12\frac{1}{2} to a fraction with denominator 30: 12=1×152×15=1530\frac{1}{2} = \frac{1 \times 15}{2 \times 15} = \frac{15}{30}.
- Convert 13\frac{1}{3} to a fraction with denominator 30: 13=1×103×10=1030\frac{1}{3} = \frac{1 \times 10}{3 \times 10} = \frac{10}{30}.

Step 3: With all fractions having the same denominator, perform the operations:
1230+15301030=12+151030=1730\frac{12}{30} + \frac{15}{30} - \frac{10}{30} = \frac{12 + 15 - 10}{30} = \frac{17}{30}.

Step 4: Since 1730\frac{17}{30} is in its simplest form, no further simplification is needed.

Therefore, the correct answer is 1730\frac{17}{30}.

Answer

1730 \frac{17}{30}

Exercise #13

Solve the following exercise:

91045+12=? \frac{9}{10}-\frac{4}{5}+\frac{1}{2}=\text{?}

Video Solution

Step-by-Step Solution

To solve the expression 91045+12 \frac{9}{10} - \frac{4}{5} + \frac{1}{2} , we first seek a common denominator for the fractions. The denominators are 10, 5, and 2.

The least common multiple of these numbers is 10, as it is the smallest number that all denominators divide perfectly.

  • Convert 45 \frac{4}{5} to a fraction with a denominator of 10: 45=4×25×2=810 \frac{4}{5} = \frac{4 \times 2}{5 \times 2} = \frac{8}{10} .
  • Convert 12 \frac{1}{2} to a fraction with a denominator of 10: 12=1×52×5=510 \frac{1}{2} = \frac{1 \times 5}{2 \times 5} = \frac{5}{10} .

Now, the expression becomes 910810+510 \frac{9}{10} - \frac{8}{10} + \frac{5}{10} .

Perform the operations:

  • Subtract: 910810=110 \frac{9}{10} - \frac{8}{10} = \frac{1}{10} .
  • Add: 110+510=610 \frac{1}{10} + \frac{5}{10} = \frac{6}{10} .

Thus, the value of the expression is 610 \frac{6}{10} .

The correct answer is 610\frac{6}{10}.

Answer

610 \frac{6}{10}

Exercise #14

Solve the following exercise:

410+1512=? \frac{4}{10}+\frac{1}{5}-\frac{1}{2}=\text{?}

Video Solution

Step-by-Step Solution

To solve the expression 410+1512 \frac{4}{10} + \frac{1}{5} - \frac{1}{2} , we will follow these steps:

  • Step 1: Find a Common Denominator
    The denominators we have are 10, 5, and 2. The least common denominator (LCD) among these numbers is 10.

  • Step 2: Convert Fractions to Equivalent Fractions with the LCD
    - 410 \frac{4}{10} is already using 10 as the denominator.
    - 15=1×25×2=210 \frac{1}{5} = \frac{1 \times 2}{5 \times 2} = \frac{2}{10} .
    - 12=1×52×5=510 \frac{1}{2} = \frac{1 \times 5}{2 \times 5} = \frac{5}{10} .

  • Step 3: Perform the Arithmetic Operations
    Substitute the converted fractions into the original expression:
    410+210510 \frac{4}{10} + \frac{2}{10} - \frac{5}{10}
    Combine the numerators over the common denominator:
    4+2510=110 \frac{4 + 2 - 5}{10} = \frac{1}{10}

  • Step 4: Simplify the Result
    The fraction 110 \frac{1}{10} is already in its simplest form.

Therefore, the solution to the problem is 110 \frac{1}{10} .

Answer

110 \frac{1}{10}

Exercise #15

Solve the following exercise:

38+1214=? \frac{3}{8}+\frac{1}{2}-\frac{1}{4}=\text{?}

Video Solution

Step-by-Step Solution

To solve the problem, let's work through the following steps:

  • Step 1: Identify the least common denominator (LCD) for all fractions.
    - The denominators are 8, 2, and 4. The LCM of these numbers is 8.

  • Step 2: Convert each fraction to have this common denominator of 8.
    - 38\frac{3}{8} is already with a denominator of 8.
    - 12\frac{1}{2} can be rewritten as 48\frac{4}{8} because 1×42×4=48\frac{1 \times 4}{2 \times 4} = \frac{4}{8}.
    - 14\frac{1}{4} can be rewritten as 28\frac{2}{8} because 1×24×2=28\frac{1 \times 2}{4 \times 2} = \frac{2}{8}.

  • Step 3: Perform the arithmetic operations.
    - Add 38\frac{3}{8} and 48\frac{4}{8}, which gives 3+48=78\frac{3 + 4}{8} = \frac{7}{8}.
    - Subtract 28\frac{2}{8} from 78\frac{7}{8}, giving 728=58\frac{7 - 2}{8} = \frac{5}{8}.

  • Step 4: Simplify the answer if necessary.
    58\frac{5}{8} is already in its simplest form.

Therefore, the solution to the problem is 58 \frac{5}{8} .

Answer

58 \frac{5}{8}

Exercise #16

14+34+320510= \frac{1}{4}+\frac{3}{4}+\frac{3}{20}-\frac{5}{10}=

Video Solution

Step-by-Step Solution

To solve the problem, we will find the result of 14+34+320510 \frac{1}{4}+\frac{3}{4}+\frac{3}{20}-\frac{5}{10} by following these steps:

  • Step 1: Combine fractions with the same denominator.
  • Step 2: Find a common denominator for the remaining fractions.
  • Step 3: Perform addition and subtraction accordingly.

Now, let's work through each step:

Step 1: Combine 14 \frac{1}{4} and 34 \frac{3}{4} :
Both fractions have the denominator of 4, so we add their numerators:
14+34=44=1 \frac{1}{4} + \frac{3}{4} = \frac{4}{4} = 1 .

Step 2: Deal with the remaining fractions 320 \frac{3}{20} and 12 \frac{1}{2} :
We can change 510 \frac{5}{10} to 12 \frac{1}{2} and find a common denominator of 20 for 12 \frac{1}{2} and 320 \frac{3}{20} :
Convert 12 \frac{1}{2} to 1020 \frac{10}{20} .

Step 3: Now the expression is 1+3201020 1 + \frac{3}{20} - \frac{10}{20} . Simplify the fraction part:
Subtract 1020 \frac{10}{20} from 320 \frac{3}{20} :
3201020=720 \frac{3}{20} - \frac{10}{20} = \frac{-7}{20} .

So the expression becomes 1+720 1 + \frac{-7}{20} . Write 1 as a fraction: 2020 \frac{20}{20} .

Step 4: Now add 2020+720 \frac{20}{20} + \frac{-7}{20} :
2020+720=1320 \frac{20}{20} + \frac{-7}{20} = \frac{13}{20} .

Therefore, the solution to the problem is 1320 \frac{13}{20} . The correct answer choice is (1320 \frac{13}{20} ).

Answer

1320 \frac{13}{20}

Exercise #17

1434+12510= \frac{1}{4}-\frac{3}{4}+\frac{1}{2}-\frac{5}{10}=

Video Solution

Step-by-Step Solution

To solve this problem, we need to first find a common denominator for all the fractions involved: 1434+12510\frac{1}{4} - \frac{3}{4} + \frac{1}{2} - \frac{5}{10}.

  • Step 1: Identify the least common denominator (LCD). Here, the denominators are 44, 44, 22, and 1010. The smallest number all these can divide into is 2020.
  • Step 2: Convert each fraction to have this common denominator.
    • 14=1×54×5=520\frac{1}{4} = \frac{1 \times 5}{4 \times 5} = \frac{5}{20}
    • 34=3×54×5=1520\frac{3}{4} = \frac{3 \times 5}{4 \times 5} = \frac{15}{20}
    • 12=1×102×10=1020\frac{1}{2} = \frac{1 \times 10}{2 \times 10} = \frac{10}{20}
    • 510=5×210×2=1020\frac{5}{10} = \frac{5 \times 2}{10 \times 2} = \frac{10}{20}
  • Step 3: Substitute these equivalent fractions back into the expression and simplify:
    5201520+10201020.\frac{5}{20} - \frac{15}{20} + \frac{10}{20} - \frac{10}{20}.
  • Step 4: Perform the arithmetic operations:
    • (5201520)=1020.\left(\frac{5}{20} - \frac{15}{20}\right) = -\frac{10}{20}.
    • (1020+1020)=0.\left(-\frac{10}{20} + \frac{10}{20}\right) = 0.
    • 01020=1020=12.0 - \frac{10}{20} = -\frac{10}{20} = -\frac{1}{2}.

Therefore, the solution to the problem is 12-\frac{1}{2}.

Answer

12 -\frac{1}{2}