5th Grade Math Worksheet: Adding Fractions with Like Denominators

Let’s solve each problem step by step. Since all the fractions have the same denominator (bottom number), we can just add the numerators (top numbers) and keep the denominator the same.

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Problem 1:
4/11 + 6/11 = (4 + 6)/11 = 10/11

Problem 2:
12/40 + 11/40 = (12 + 11)/40 = 23/40

Problem 3:
12/33 + 9/33 = (12 + 9)/33 = 21/33
We can simplify this! Both 21 and 33 are divisible by 3:
21 ÷ 3 = 7, 33 ÷ 3 = 11 → 7/11

Problem 4:
6/21 + 5/21 = (6 + 5)/21 = 11/21

Problem 5:
3/13 + 8/13 = (3 + 8)/13 = 11/13

Problem 6:
5/22 + 7/22 = (5 + 7)/22 = 12/22
Simplify: both 12 and 22 divisible by 2 → 12 ÷ 2 = 6, 22 ÷ 2 = 11 → 6/11

Problem 7:
13/35 + 11/35 = (13 + 11)/35 = 24/35

Problem 8:
11/43 + 18/43 = (11 + 18)/43 = 29/43

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Final Answer:
1. 10/11
2. 23/40
3. 7/11
4. 11/21
5. 11/13
6. 6/11
7. 24/35
8. 29/43