Examples with solutions for Addition of Fractions: One of the denominators is the common denominator in visual display

Exercise #1

Solve the following exercise:

15+710=? \frac{1}{5}+\frac{7}{10}=\text{?}

Video Solution

Step-by-Step Solution

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

  • Step 1: Identify the least common denominator of the fractions.
  • Step 2: Convert each fraction to have this common denominator.
  • Step 3: Add the converted fractions.

Now, let's work through each step:
Step 1: The least common denominator of 5 and 10 is 10.
Step 2: Convert 15 \frac{1}{5} to a fraction with a denominator of 10. To do this, multiply both the numerator and denominator by 2:
15=1×25×2=210 \frac{1}{5} = \frac{1 \times 2}{5 \times 2} = \frac{2}{10}
Step 3: Add the converted fraction 210 \frac{2}{10} to 710 \frac{7}{10} :
210+710=2+710=910 \frac{2}{10} + \frac{7}{10} = \frac{2 + 7}{10} = \frac{9}{10}

Therefore, the solution to the problem is 910 \frac{9}{10} .

Answer

910 \frac{9}{10}

Exercise #2

Solve the following exercise:

23+29=? \frac{2}{3}+\frac{2}{9}=\text{?}

Video Solution

Step-by-Step Solution

To solve this problem, we need to add the fractions 23\frac{2}{3} and 29\frac{2}{9}.

Step 1: Find a common denominator.

Given fractions have denominators 3 and 9. The least common multiple of 3 and 9 is 9. Therefore, we use 9 as the common denominator.

Step 2: Convert fractions to have the same denominator.

The second fraction, 29\frac{2}{9}, already has 9 as its denominator. We need to convert 23\frac{2}{3} to have a denominator of 9.

To convert 23\frac{2}{3}:
Multiply both the numerator and the denominator by 3:
23×33=69 \frac{2}{3} \times \frac{3}{3} = \frac{6}{9} .

Step 3: Add the fractions 69\frac{6}{9} and 29\frac{2}{9}.

Since the denominators are the same, add the numerators:
69+29=6+29=89\frac{6}{9} + \frac{2}{9} = \frac{6+2}{9} = \frac{8}{9}.

Therefore, the sum of 23\frac{2}{3} and 29\frac{2}{9} is 89\frac{8}{9}, which corresponds to choice number 3.

Answer

89 \frac{8}{9}

Exercise #3

Solve the following exercise:

24+38=? \frac{2}{4}+\frac{3}{8}=\text{?}

Video Solution

Step-by-Step Solution

To solve the problem of adding 24 \frac{2}{4} and 38 \frac{3}{8} , we need to follow these steps:

  • Step 1: Convert 24 \frac{2}{4} to an equivalent fraction with a denominator of 8.
  • Step 2: Add the two fractions with the common denominator.
  • Step 3: Verify the solution and match it against the provided answer choices.

Let's perform each step:

Step 1: Convert 24 \frac{2}{4} to a fraction with a denominator of 8.
To do this, we multiply both the numerator and the denominator of 24 \frac{2}{4} by 2, since 4×2=8 4 \times 2 = 8 .
This gives us 2×24×2=48 \frac{2 \times 2}{4 \times 2} = \frac{4}{8} .

Step 2: Add 48 \frac{4}{8} and 38 \frac{3}{8} .
Since both fractions now have the same denominator, we can add the numerators directly:
48+38=4+38=78 \frac{4}{8} + \frac{3}{8} = \frac{4+3}{8} = \frac{7}{8} .

Step 3: Verify the solution.
The calculated sum of the fractions is 78 \frac{7}{8} . This matches choice 1 in the given answer choices.

The solution to the problem is 78 \frac{7}{8} .

Answer

78 \frac{7}{8}

Exercise #4

Solve the following exercise:

15+310=? \frac{1}{5}+\frac{3}{10}=\text{?}

Video Solution

Step-by-Step Solution

To solve this problem, let's break it down into clear, manageable steps:

  • Step 1: Identify the common denominator. Here, the denominators are 5 and 10. The least common denominator (LCD) is 10.
  • Step 2: Convert 15 \frac{1}{5} to an equivalent fraction with a denominator of 10. This means multiplying both the numerator and denominator by 2. Thus, 15=210 \frac{1}{5} = \frac{2}{10} .
  • Step 3: We already have 310 \frac{3}{10} with a denominator of 10, so no conversion is necessary.
  • Step 4: Add the two fractions: 210+310=2+310=510 \frac{2}{10} + \frac{3}{10} = \frac{2 + 3}{10} = \frac{5}{10} .
  • Step 5: Verify if the fraction can be simplified. Here, 510 \frac{5}{10} is already in its simplest form equivalent to 12 \frac{1}{2} , but, as part of the answer choices, it appears as 510 \frac{5}{10} .

Therefore, the correct answer is 510 \frac{5}{10} .

Answer

510 \frac{5}{10}

Exercise #5

Solve the following exercise:

12+14=? \frac{1}{2}+\frac{1}{4}=\text{?}

Video Solution

Step-by-Step Solution

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

  • Step 1: Identify the least common denominator (LCD)

The denominators given are 2 and 4. The least common multiple of these numbers is 4. Thus, the least common denominator is 4.

  • Step 2: Convert each fraction to have the common denominator

We need to convert 12 \frac{1}{2} to a fraction with a denominator of 4. To do this, we multiply both the numerator and the denominator of 12 \frac{1}{2} by 2:

12=1×22×2=24 \frac{1}{2} = \frac{1 \times 2}{2 \times 2} = \frac{2}{4}

The fraction 14 \frac{1}{4} already has the denominator 4, so it remains unchanged.

  • Step 3: Add the converted fractions

Now add 24 \frac{2}{4} and 14 \frac{1}{4} :

24+14=2+14=34 \frac{2}{4} + \frac{1}{4} = \frac{2+1}{4} = \frac{3}{4}

Therefore, the sum of 12+14 \frac{1}{2} + \frac{1}{4} is 34 \frac{3}{4} .

Answer

34 \frac{3}{4}

Exercise #6

Solve the following exercise:

13+36=? \frac{1}{3}+\frac{3}{6}=\text{?}

Video Solution

Step-by-Step Solution

To solve the problem of adding the fractions 13 \frac{1}{3} and 36 \frac{3}{6} , we must find a common denominator:

  • Step 1: Identify a common denominator. Since the denominators are 3 and 6, and 6 is a multiple of 3, we can use 6 as the common denominator.

  • Step 2: Convert 13 \frac{1}{3} to a fraction with a denominator of 6. To do this, multiply both the numerator and denominator of 13 \frac{1}{3} by 2 to get: 1×23×2=26 \frac{1 \times 2}{3 \times 2} = \frac{2}{6} .

  • Step 3: Now, add the converted fraction 26 \frac{2}{6} to 36 \frac{3}{6} . Since they have the same denominator, we can add the numerators: 26+36=2+36=56 \frac{2}{6} + \frac{3}{6} = \frac{2 + 3}{6} = \frac{5}{6} .

The answer to the problem is therefore 56 \frac{5}{6} . This result matches choice id 3: 56 \frac{5}{6} .

Answer

56 \frac{5}{6}

Exercise #7

Solve the following exercise:

34+18=? \frac{3}{4}+\frac{1}{8}=\text{?}

Video Solution

Step-by-Step Solution

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

  • Step 1: Find a common denominator for the fractions.
  • Step 2: Convert 34 \frac{3}{4} to a fraction with the new denominator.
  • Step 3: Add the two fractions.
  • Step 4: Simplify if necessary.

Now, let's go through the process:

Step 1: The problem is 34+18 \frac{3}{4} + \frac{1}{8} . The least common denominator (LCD) for 4 and 8 is 8.

Step 2: Convert 34 \frac{3}{4} to a fraction with a denominator of 8. To do this, multiply both the numerator and the denominator of 34 \frac{3}{4} by 2:

34=3×24×2=68 \frac{3}{4} = \frac{3 \times 2}{4 \times 2} = \frac{6}{8} .

Step 3: Now, add the two fractions with the same denominator:

68+18=6+18=78 \frac{6}{8} + \frac{1}{8} = \frac{6+1}{8} = \frac{7}{8} .

Step 4: The fraction 78 \frac{7}{8} is already in its simplest form.

Therefore, the solution to this problem is 78 \frac{7}{8} .

Answer

78 \frac{7}{8}

Exercise #8

Solve the following exercise:

12+16=? \frac{1}{2}+\frac{1}{6}=\text{?}

Video Solution

Step-by-Step Solution

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

  • Step 1: Identify the common denominator of the fractions.

  • Step 2: Convert each fraction to an equivalent fraction with this common denominator.

  • Step 3: Add the fractions.

Now, let's work through each step:

Step 1: The denominators of our fractions are 2 and 6. The least common denominator (LCD) between 2 and 6 is 6.

Step 2: Convert 12\frac{1}{2} to an equivalent fraction with a denominator of 6. To do this, multiply both the numerator and the denominator by 3:

12=1×32×3=36 \frac{1}{2} = \frac{1 \times 3}{2 \times 3} = \frac{3}{6}

Since 16\frac{1}{6} already has the common denominator of 6, it remains unchanged, 16\frac{1}{6}.

Step 3: Add the fractions:

36+16=3+16=46 \frac{3}{6} + \frac{1}{6} = \frac{3+1}{6} = \frac{4}{6}

Therefore, the correct answer is 46 \frac{4}{6} .

Verify this matches choice 4. Thus, the correct choice is :46 \frac{4}{6}

Answer

46 \frac{4}{6}

Exercise #9

Solve the following exercise:

25+410=? \frac{2}{5}+\frac{4}{10}=\text{?}

Video Solution

Step-by-Step Solution

To solve this problem, we will add the fractions by first finding a common denominator:

  • Step 1: Identify that the denominators are 5 and 10. Since 10 is a multiple of 5, we choose 10 as the common denominator.
  • Step 2: Convert 25 \frac{2}{5} into a fraction with a denominator of 10. Multiply both numerator and denominator by 2 to get 410 \frac{4}{10} .
  • Step 3: Now both fractions are over 10: 410 \frac{4}{10} and 410 \frac{4}{10} .
  • Step 4: Add the numerators: 4+4=8 4 + 4 = 8 .
  • Step 5: The sum is 810 \frac{8}{10} .

Therefore, the solution to the problem is 810 \frac{8}{10} .

The correct answer choice is: 810 \frac{8}{10} .

Answer

810 \frac{8}{10}

Exercise #10

Solve the following exercise:

12+24=? \frac{1}{2}+\frac{2}{4}=\text{?}

Video Solution

Step-by-Step Solution

To solve the problem of adding the fractions 12 \frac{1}{2} and 24 \frac{2}{4} , we can follow these steps:

  • Step 1: Convert the fraction 12 \frac{1}{2} to have the same denominator as 24 \frac{2}{4} .
  • Step 2: Add the two fractions.
  • Step 3: Simplify the sum, if necessary.

Now, let's execute these steps in detail:
Step 1: Convert 12 \frac{1}{2} to a fraction with a denominator of 4. To do this, multiply both the numerator and the denominator by 2. Thus, 12=1×22×2=24 \frac{1}{2} = \frac{1 \times 2}{2 \times 2} = \frac{2}{4} .
Step 2: Now, add the fractions 24+24 \frac{2}{4} + \frac{2}{4} . Since the denominators are the same, we add the numerators and keep the common denominator: 2+24=44 \frac{2+2}{4} = \frac{4}{4} .
Step 3: Simplify 44 \frac{4}{4} , which equals 1. However, the problem asks for the sum in fraction form, so we present it as 44 \frac{4}{4} .

Therefore, the solution to the given problem is 44 \frac{4}{4} .

Answer

44 \frac{4}{4}

Exercise #11

Solve the following exercise:

13+16=? \frac{1}{3}+\frac{1}{6}=\text{?}

Video Solution

Step-by-Step Solution

To solve 13+16 \frac{1}{3} + \frac{1}{6} , follow these steps:

  • Step 1: Identify a common denominator for the fractions.
    Since 6 6 is a multiple of 3 3 , 6 6 is the common denominator.
  • Step 2: Convert 13 \frac{1}{3} to a fraction with denominator 6 6 .
    Multiply both the numerator and denominator of 13 \frac{1}{3} by 2 2 :

13=1×23×2=26 \frac{1}{3} = \frac{1 \times 2}{3 \times 2} = \frac{2}{6}

  • Step 3: Add the fractions 26+16 \frac{2}{6} + \frac{1}{6} .
  • Simply add the numerators and keep the common denominator:

26+16=2+16=36 \frac{2}{6} + \frac{1}{6} = \frac{2 + 1}{6} = \frac{3}{6}

Thus, after solving the addition, we get 36 \frac{3}{6} .

Answer

36 \frac{3}{6}

Exercise #12

Solve the following exercise:

15+610=? \frac{1}{5}+\frac{6}{10}=\text{?}

Video Solution

Step-by-Step Solution

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

  • Step 1: Identify the given fractions and their denominators.
  • Step 2: Determine a common denominator.
  • Step 3: Convert each fraction to have the common denominator.
  • Step 4: Add the fractions' numerators together.
  • Step 5: Verify the answer against the possible choices.

Now, let's work through each step:

Step 1: The given fractions are 15 \frac{1}{5} and 610 \frac{6}{10} .

Step 2: The common denominator for these fractions is 10, as it is already the denominator of the second fraction.

Step 3: Convert 15 \frac{1}{5} to a fraction with a denominator of 10 by multiplying both the numerator and the denominator by 2:
15=1×25×2=210 \frac{1}{5} = \frac{1 \times 2}{5 \times 2} = \frac{2}{10} .

Step 4: Add the fractions with the common denominator:
210+610=2+610=810 \frac{2}{10} + \frac{6}{10} = \frac{2 + 6}{10} = \frac{8}{10} .

Step 5: Compare the result 810 \frac{8}{10} with the possible choices given. The correct choice is 810\frac{8}{10}, which matches choice id="2".

Therefore, the solution to the problem is 810 \frac{8}{10} .

Answer

810 \frac{8}{10}

Exercise #13

Solve the following exercise:

12.5+25=? \frac{1}{2.5}+\frac{2}{5}=\text{?}

Video Solution

Answer

45 \frac{4}{5}