Examples with solutions for Addition of Fractions: Fractions with common denominators

Exercise #1

Solve the following exercise:

15+25=? \frac{1}{5}+\frac{2}{5}=\text{?}

Video Solution

Step-by-Step Solution

To solve the problem of adding 15\frac{1}{5} and 25\frac{2}{5}, follow these steps:

Step 1: Identify the denominators

Both fractions, 15\frac{1}{5} and 25\frac{2}{5}, have the common denominator of 5. This simplifies the addition process since we only need to add the numerators.

Step 2: Add the numerators

When adding fractions with the same denominator, keep the denominator unchanged:

15+25=1+25 \frac{1}{5} + \frac{2}{5} = \frac{1 + 2}{5}

Step 3: Perform the addition

Add the numerators: 1+2=3 1 + 2 = 3 . So, the sum is:

35 \frac{3}{5}

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

Answer

35 \frac{3}{5}

Exercise #2

Solve the following exercise:

47+27=? \frac{4}{7}+\frac{2}{7}=\text{?}

Video Solution

Step-by-Step Solution

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

  • Step 1: Identify the given fractions 47 \frac{4}{7} and 27 \frac{2}{7} .
  • Step 2: Since the denominators are the same, add the numerators directly.
  • Step 3: Maintain the common denominator in the result.

Now, let's work through each step:
Step 1: The problem gives us the fractions 47 \frac{4}{7} and 27 \frac{2}{7} .
Step 2: Add the numerators: 4+2=6 4 + 2 = 6 .
Step 3: The common denominator remains 7, so the result is 67 \frac{6}{7} .

Therefore, the solution to the problem is 67 \frac{6}{7} .

Answer

67 \frac{6}{7}

Exercise #3

Solve the following exercise:

411+511=? \frac{4}{11}+\frac{5}{11}=\text{?}

Video Solution

Step-by-Step Solution

To solve the problem of adding the fractions 411+511\frac{4}{11} + \frac{5}{11}, we follow these steps:

  • Step 1: Identify that both fractions have the same denominator of 11.
  • Step 2: Since the denominators are the same, we can add their numerators directly:
    4+5=94 + 5 = 9.
  • Step 3: Keep the common denominator, which remains as 11.

Now we combine these results to find the sum of the fractions:

411+511=911 \frac{4}{11} + \frac{5}{11} = \frac{9}{11}

The solution to the problem is 911 \frac{9}{11} , which matches choice 3 in the provided options.

Answer

911 \frac{9}{11}

Exercise #4

Solve the following exercise:

47+37=? \frac{4}{7}+\frac{3}{7}=\text{?}

Video Solution

Step-by-Step Solution

To solve the addition of the two fractions 47+37 \frac{4}{7} + \frac{3}{7} , follow these steps:

  • Step 1: Since both fractions have the same denominator, add the numerators directly: 4+3=74 + 3 = 7.
  • Step 2: Retain the common denominator: 77.
  • Step 3: The resulting fraction after addition is 77 \frac{7}{7} .
  • Step 4: Simplify the resulting fraction if possible. Since 77=1 \frac{7}{7} = 1 , the simplified result is 11.

Therefore, the solution to the problem is 1.

Answer

1

Exercise #5

Solve the following exercise:

313+713=? \frac{3}{13}+\frac{7}{13}=\text{?}

Video Solution

Step-by-Step Solution

To solve this problem, we add the fractions 313\frac{3}{13} and 713\frac{7}{13} which have the same denominator.

When fractions have the same denominator, we simply add the numerators and place the sum over the common denominator.

313+713=3+713=1013\frac{3}{13} + \frac{7}{13} = \frac{3 + 7}{13} = \frac{10}{13}

The sum of the numerators is 1010 and the denominator remains 1313.

Therefore, the solution to the problem is 1013\frac{10}{13}.

Answer

1013 \frac{10}{13}

Exercise #6

Solve the following exercise:

07+37=? \frac{0}{7}+\frac{3}{7}=\text{?}

Video Solution

Step-by-Step Solution

To solve this problem, let's perform addition of fractions with like denominators:

  • The given fractions are 07 \frac{0}{7} and 37 \frac{3}{7} .
  • Since they have the same denominator (7), we add the numerators: 0+3 0 + 3 .
  • This results in a new numerator of 3, with the denominator remaining 7.
  • Thus, the sum of the fractions is 37 \frac{3}{7} .

Therefore, the solution to the problem is 37 \frac{3}{7} .

Answer

37 \frac{3}{7}

Exercise #7

Solve the following exercise:

19+29=? \frac{1}{9}+\frac{2}{9}=\text{?}

Video Solution

Step-by-Step Solution

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

  • Step 1: Identify the common denominator for the fractions 19\frac{1}{9} and 29\frac{2}{9}.
  • Step 2: Add the numerators since the denominators are the same.
  • Step 3: Write the sum over the common denominator.

Let's work through each step:

Step 1: Both fractions have a denominator of 9.

Step 2: Add the numerators: 1+2=31 + 2 = 3.

Step 3: Write the result over the common denominator: 39\frac{3}{9}.

Therefore, the solution to the problem is 39\frac{3}{9}, which is choice 1.

Answer

39 \frac{3}{9}

Exercise #8

Solve the following exercise:

17+27=? \frac{1}{7}+\frac{2}{7}=\text{?}

Video Solution

Step-by-Step Solution

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

  • Step 1: Identify that both fractions have the same denominator.
  • Step 2: Add the numerators while keeping the denominator constant.
  • Step 3: Simplify the resulting fraction if necessary.

Now, let's work through each step:
Step 1: Both fractions, 17\frac{1}{7} and 27\frac{2}{7}, have a common denominator of 7.
Step 2: Add the numerators: 1+2=31 + 2 = 3.
Step 3: Write the sum as a fraction with the denominator 7: 37\frac{3}{7}.

Therefore, the solution to the problem is 37\frac{3}{7}.

Answer

37 \frac{3}{7}

Exercise #9

Solve the following exercise:

25+25=? \frac{2}{5}+\frac{2}{5}=\text{?}

Video Solution

Step-by-Step Solution

To solve the problem of adding two fractions with a common denominator, we follow these steps:

  • Step 1: Identify the numerators and denominators. Both fractions are 25 \frac{2}{5} .
  • Step 2: Since the denominators are the same, add the numerators: 2+2=4 2 + 2 = 4 .
  • Step 3: Keep the common denominator: 5.
  • Step 4: Form the result as a new fraction: 45 \frac{4}{5} .

Therefore, the sum of 25 \frac{2}{5} and 25 \frac{2}{5} is 45 \frac{4}{5} .

The correct choice from the provided options is 45\frac{4}{5}, which corresponds to choice 4.

Answer

45 \frac{4}{5}

Exercise #10

Solve the following exercise:

48+38=? \frac{4}{8}+\frac{3}{8}=\text{?}

Video Solution

Step-by-Step Solution

To solve this problem, we'll apply the formula for adding fractions with a common denominator:

Step 1: Add the numerators of the fractions. Since the denominators are already equal, simply add:

  • The numerators: 4+3=74 + 3 = 7.

Step 2: Keep the denominator the same:

  • The denominator remains 8, so the fraction becomes 78\frac{7}{8}.

Therefore, the sum of 48+38 \frac{4}{8} + \frac{3}{8} is 78 \frac{7}{8} .

Answer

78 \frac{7}{8}

Exercise #11

Solve the following exercise:

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

Video Solution

Step-by-Step Solution

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

  • Step 1: Acknowledge that the fractions have a common denominator of 3.
  • Step 2: Add the numerators of the two fractions.
  • Step 3: Maintain the common denominator and simplify if necessary.

Now, let's work through each step:

Step 1: The fractions given are 13 \frac{1}{3} and 13 \frac{1}{3} , both having the denominator 3.

Step 2: Add the numerators: 1+1=2 1 + 1 = 2 .

Step 3: The resulting fraction is 23 \frac{2}{3} , with the denominator remaining unchanged. Simplification is not required.

Therefore, the solution to the problem is 23 \frac{2}{3} .

Answer

23 \frac{2}{3}

Exercise #12

Solve the following exercise:

410+410=? \frac{4}{10}+\frac{4}{10}=\text{?}

Video Solution

Step-by-Step Solution

To solve this problem, let us proceed with the following steps:

  • Step 1: Identify the given fractions. We have two fractions: 410 \frac{4}{10} and 410 \frac{4}{10} .
  • Step 2: Recognize that both fractions have the same denominator, which makes the addition straightforward.
  • Step 3: Add only their numerators while keeping the common denominator. Therefore, 4+4=8 4 + 4 = 8 .
  • Step 4: Write the result with the calculated numerator and common denominator, obtaining 810 \frac{8}{10} .

Based on our calculations, the sum of these fractions is 810 \frac{8}{10} .

This answer matches choice 3 in the options provided.

Answer

810 \frac{8}{10}

Exercise #13

Solve the following exercise:

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

Video Solution

Step-by-Step Solution

To solve this problem, we need to add the two fractions 12+12 \frac{1}{2} + \frac{1}{2} . Since the fractions have the same denominator, we apply fraction addition rules by:

  • Add the numerators: 1+1=2 1 + 1 = 2 .
  • Keep the denominator the same: 2 2 .
  • The resulting fraction is 22 \frac{2}{2} .
  • Simplify 22 \frac{2}{2} to 1 1 since the numerator and denominator are equal.

Therefore, the sum of 12+12 \frac{1}{2} + \frac{1}{2} is 1 1 .

The correct answer is option 3: 1.

Answer

1

Exercise #14

Solve the following exercise:

27+27=? \frac{2}{7}+\frac{2}{7}=\text{?}

Video Solution

Step-by-Step Solution

To solve the problem of adding 27\frac{2}{7} and 27\frac{2}{7}, we proceed with the following steps:

Step 1: Identify the common denominator, which is 7 in this case. Since both fractions have the same denominator, we can apply the formula directly for adding fractions with a common denominator:

ac+bc=a+bc \frac{a}{c} + \frac{b}{c} = \frac{a+b}{c}

Step 2: Add the numerators of the fractions. Combining the numerators, we have:

2+2=4 2 + 2 = 4

Step 3: Write the resulting fraction using the sum of the numerators and the common denominator. The resulting fraction becomes:

47 \frac{4}{7}

Conclusion: By adding the numerators and using the shared denominator, the sum of 27+27\frac{2}{7} + \frac{2}{7} is 47\frac{4}{7}.

The correct answer choice is 47\frac{4}{7}, and this corresponds to choice 4.

Thus, the solution to the problem is 47 \frac{4}{7} .

Answer

47 \frac{4}{7}

Exercise #15

Solve the following exercise:

14+24=? \frac{1}{4}+\frac{2}{4}=\text{?}

Video Solution

Step-by-Step Solution

To solve this addition of fractions, we'll proceed with the following steps:

  • Step 1: Observe that both fractions, 14\frac{1}{4} and 24\frac{2}{4}, have the same denominator 4.
  • Step 2: Apply the rule: Add the numerators and keep the denominator the same: 14+24=1+24 \frac{1}{4} + \frac{2}{4} = \frac{1+2}{4} .
  • Step 3: Compute the sum of the numerators: 1+2=3 1 + 2 = 3 .
  • Step 4: Thus, the resulting fraction is 34 \frac{3}{4} .

Therefore, the solution to the exercise 14+24\frac{1}{4} + \frac{2}{4} is 34 \frac{3}{4} .

Answer

34 \frac{3}{4}

Exercise #16

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

Video Solution

Step-by-Step Solution

To solve the problem of adding the fractions 26+36 \frac{2}{6} + \frac{3}{6} , we'll follow these steps:

  • Step 1: Since both fractions have the same denominator (6), we can add the numerators directly.
  • Step 2: Add the numerators: 2+3=5 2 + 3 = 5 .
  • Step 3: Place the sum of the numerators over the common denominator: 56 \frac{5}{6} .
  • Step 4: The fraction 56 \frac{5}{6} is already in simplest form.

Therefore, the solution to the problem is 56 \frac{5}{6} .

Answer

56 \frac{5}{6}

Exercise #17

112+712= \frac{1}{12}+\frac{7}{12}=

Video Solution

Step-by-Step Solution

To solve this problem, we'll use the approach of adding fractions with a common denominator:

  • Step 1: Identify that the fractions 112 \frac{1}{12} and 712 \frac{7}{12} have a common denominator, which is 12.
  • Step 2: Since the denominators are the same, we add the numerators: 1+7=8 1 + 7 = 8 .
  • Step 3: Keep the common denominator, which is 12.

Therefore, the sum of the fractions is 812\frac{8}{12}.

Thus, the solution to the problem is 812 \frac{8}{12} .

Answer

812 \frac{8}{12}

Exercise #18

110+210= \frac{1}{10}+\frac{2}{10}=

Video Solution

Step-by-Step Solution

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

  • Step 1: Identify that both fractions have a common denominator.
  • Step 2: Add the numerators while retaining the common denominator.

Let's work through each step:
Step 1: We have two fractions, 110 \frac{1}{10} and 210 \frac{2}{10} , with the same denominator.

Step 2: We add their numerators:
1+2=3 1 + 2 = 3 .
Keep the common denominator:
Thus, the fraction becomes 310 \frac{3}{10} .

Therefore, the solution to the problem is 310 \frac{3}{10} .

Answer

310 \frac{3}{10}

Exercise #19

17+57= \frac{1}{7}+\frac{5}{7}=

Video Solution

Step-by-Step Solution

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

  • Step 1: Identify that both fractions have the same denominator of 7.
  • Step 2: Add the numerators together: 1+5=6 1 + 5 = 6 .
  • Step 3: Place the sum of the numerators over the common denominator.

Now, let's work through the solution:

Step 1: Since both fractions, 17 \frac{1}{7} and 57 \frac{5}{7} , have the same denominator, we can directly apply the addition rule for fractions with a common denominator.

Step 2: Add the numerators 1 and 5. Performing this calculation: 1+5=6 1 + 5 = 6 .

Step 3: Place this result over the common denominator of 7. Therefore:

17+57=1+57=67 \frac{1}{7} + \frac{5}{7} = \frac{1+5}{7} = \frac{6}{7}

Therefore, the solution to the problem is 67 \frac{6}{7} .

Answer

67 \frac{6}{7}

Exercise #20

15+25= \frac{1}{5}+\frac{2}{5}=

Video Solution

Step-by-Step Solution

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

  • Step 1: Identify the numbers to add: 15 \frac{1}{5} and 25 \frac{2}{5} .
  • Step 2: Confirm they have a common denominator.
  • Step 3: Add their numerators.
  • Step 4: Keep the common denominator.

Let's execute these steps:

Step 1: We have the fractions 15 \frac{1}{5} and 25 \frac{2}{5} .

Step 2: Confirmed, both fractions have a common denominator, which is 5.

Step 3: Add the numerators: 1+2=3 1 + 2 = 3 .

Step 4: The denominator remains the same: 5.

Therefore, the sum of the fractions is 35 \frac{3}{5} .

Answer

35 \frac{3}{5}