# Hoja De Trabajo 7° Grado

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| By Troy Wesson
T
Troy Wesson
Community Contributor
Quizzes Created: 3 | Total Attempts: 637
Questions: 5 | Attempts: 124

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• 1.

### Sumar 2/3 - 3/5 + 2/15

• A.

1/5

• B.

3/15

• C.

5/3

• D.

1/5

A. 1/5
Explanation
The given expression represents the sum of three fractions. To add fractions, we need to find a common denominator. In this case, the common denominator is 15. So, we convert each fraction to have a denominator of 15. The first fraction becomes 10/15, the second fraction becomes 9/15, and the third fraction becomes 2/15. Then, we add these fractions together. 10/15 + 9/15 + 2/15 = 21/15. Simplifying this fraction, we get 7/5, which is equivalent to 1/5. Therefore, the correct answer is 1/5.

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• 2.

### 2/6 + 3/9 - 9/27

• A.

1/3

• B.

2/9

• C.

2/3

• D.

5/6

A. 1/3
Explanation
The given expression involves adding and subtracting fractions. To add or subtract fractions, we need to have a common denominator. In this case, the common denominator is 9. So, we rewrite the fractions with the common denominator: 4/9 + 1/3 - 1/3. The denominators are now the same, so we can simply add the numerators: 4 + 1 - 1 = 4. The denominator remains the same, so the result is 4/9.

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• 3.

### -1/12 + 5/6 - 3/24Which one do you like?

• A.

5/8

• B.

5/6

• C.

5/12

• D.

3/10

A. 5/8
Explanation
The given expression involves adding and subtracting fractions. To simplify the expression, we need to find a common denominator for all the fractions. The common denominator for 12, 6, and 24 is 24. Converting each fraction to have a denominator of 24, we get -2/24 + 20/24 - 3/24. Combining the numerators, we have 15/24, which can be simplified to 5/8. Therefore, the correct answer is 5/8.

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• 4.

### 3/7 - 4/21 + 25/42

• A.

2/3

• B.

- 5/6

• C.

- 2/7

• D.

5/6

D. 5/6
Explanation
The given expression involves adding and subtracting fractions. To solve it, we need to find a common denominator for the fractions involved. In this case, the common denominator is 42. When we convert each fraction to have a denominator of 42, we get 18/42 - 8/42 + 25/42. Simplifying this expression gives us 35/42, which can be further simplified to 5/6. Therefore, the correct answer is 5/6.

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• 5.

• A.

1/8

• B.

5/16

• C.

- 3/8

• D.

3/4