Curriculum›4A›Chapter 7

Chapter 7 — cumulative chapter review

Semester 4A · Chapter 7 · 33 questions

This review integrates every chapter learning objective. Try questions before revealing answers.

Question 1 · calculation

Calculate 1/2 + 3/4. Simplify.

Show answer & reasoning
1 1/4

Use the common denominator 4, then add the equal-size parts. The simplified result is 1 1/4.

Question 2 · calculation

Calculate 2/3 + 2/3. Simplify.

Show answer & reasoning
1 1/3

Use the common denominator 3, then add the equal-size parts. The simplified result is 1 1/3.

Question 3 · calculation

Calculate 2 1/4 + 1/2.

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2 3/4

Add the fractional parts with a common denominator. Include the original 2 wholes; regroup if their sum reaches a whole.

Question 4 · calculation

Calculate 1 5/8 + 3 1/2.

Show answer & reasoning
5 1/8

Combine wholes (1+3) and fractional parts (5/8+1/2); rename any extra whole.

Question 5 · calculation

Calculate 4 3/4 − 1/4.

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4 1/2

Rename one whole as denominator-sized parts if needed. The remaining quantity is 4 1/2.

Question 6 · calculation

Calculate 4 1/2 − 2 1/2.

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2

Subtract whole quantities and equivalent fractional parts, borrowing one whole if the first fractional part is smaller.

Question 7 · calculation

Calculate 4/5 + 4/5. Simplify.

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1 3/5

Use the common denominator 5, then add the equal-size parts. The simplified result is 1 3/5.

Question 8 · calculation

Calculate 2/3 + 1/3. Simplify.

Show answer & reasoning
1

Use the common denominator 3, then add the equal-size parts. The simplified result is 1.

Question 9 · calculation

Calculate 4 2/3 + 2/3.

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5 1/3

Add the fractional parts with a common denominator. Include the original 4 wholes; regroup if their sum reaches a whole.

Question 10 · calculation

Calculate 2 1/2 + 1 1/3.

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3 5/6

Combine wholes (2+1) and fractional parts (1/2+1/3); rename any extra whole.

Question 11 · calculation

Calculate 4 1/2 − 1/2.

Show answer & reasoning
4

Rename one whole as denominator-sized parts if needed. The remaining quantity is 4.

Question 12 · calculation

Calculate 2 1/4 − 1 1/2.

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3/4

Subtract whole quantities and equivalent fractional parts, borrowing one whole if the first fractional part is smaller.

Question 13 · calculation

Calculate 7/10 + 9/10. Simplify.

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1 3/5

Use the common denominator 10, then add the equal-size parts. The simplified result is 1 3/5.

Question 14 · calculation

Calculate 3/5 + 3/5. Simplify.

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1 1/5

Use the common denominator 5, then add the equal-size parts. The simplified result is 1 1/5.

Question 15 · calculation

Calculate 5 7/12 + 1/3.

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5 11/12

Add the fractional parts with a common denominator. Include the original 5 wholes; regroup if their sum reaches a whole.

Question 16 · calculation

Calculate 3 3/4 + 1 1/3.

Show answer & reasoning
5 1/12

Combine wholes (3+1) and fractional parts (3/4+1/3); rename any extra whole.

Question 17 · calculation

Calculate 1 1/2 − 1/2.

Show answer & reasoning
1

Rename one whole as denominator-sized parts if needed. The remaining quantity is 1.

Question 18 · calculation

Calculate 4 1/12 − 3 1/3.

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3/4

Subtract whole quantities and equivalent fractional parts, borrowing one whole if the first fractional part is smaller.

Question 19 · calculation

Calculate 2/3 + 1/6. Simplify.

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5/6

Use the common denominator 6, then add the equal-size parts. The simplified result is 5/6.

Question 20 · calculation

Calculate 3/5 + 2/5. Simplify.

Show answer & reasoning
1

Use the common denominator 5, then add the equal-size parts. The simplified result is 1.

Question 21 · calculation

Calculate 5 1/4 + 1/2.

Show answer & reasoning
5 3/4

Add the fractional parts with a common denominator. Include the original 5 wholes; regroup if their sum reaches a whole.

Question 22 · calculation

Calculate 5 3/5 + 2 4/5.

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8 2/5

Combine wholes (5+2) and fractional parts (3/5+4/5); rename any extra whole.

Question 23 · calculation

Calculate 3 1/4 − 1/2.

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2 3/4

Rename one whole as denominator-sized parts if needed. The remaining quantity is 2 3/4.

Question 24 · calculation

Calculate 5 2/3 − 4 5/6.

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5/6

Subtract whole quantities and equivalent fractional parts, borrowing one whole if the first fractional part is smaller.

Question 25 · calculation

Calculate 1/8 + 3/8. Simplify.

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1/2

Use the common denominator 8, then add the equal-size parts. The simplified result is 1/2.

Question 26 · calculation

Calculate 2/3 − 1/3. Simplify.

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1/3

Use the common denominator 3, then subtract the equal-size parts. The simplified result is 1/3.

Question 27 · calculation

Calculate 2 9/10 + 4/5.

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3 7/10

Add the fractional parts with a common denominator. Include the original 2 wholes; regroup if their sum reaches a whole.

Question 28 · error analysis

A student calculates 1/10 + 8/10 and writes 9/20. Identify the mistake and give the correct simplified answer.

Show answer & reasoning
9/10

Both pieces are 10ths, so combine numerators and keep the denominator. The result is 9/10.

Question 29 · error analysis

A student calculates 1/3 + 3/4 and writes 4/7. Identify the mistake and give the correct simplified answer.

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1 1/12

Use equal-size fractional parts with denominator 12; the correct sum is 1 1/12.

Question 30 · error analysis

A student calculates 2 1/4 + 1/2 and writes 2 2/6. Identify the mistake and give the correct simplified answer.

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2 3/4

Convert 1/2 into 2/4 and combine with 1/4, keeping 2 whole units. The total is 2 3/4.

Question 31 · error analysis

A student calculates 4 1/2 + 2 2/3 and writes 6 3/5. Identify the mistake and give the correct simplified answer.

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7 1/6

Combine 6 wholes and 3/6+4/6=7/6, regrouping one additional whole to reach 7 1/6.

Question 32 · error analysis

A student calculates 3 1/4 − 3/4 and writes 3 2/4. Identify the mistake and give the correct simplified answer.

Show answer & reasoning
2 1/2

Rename one whole as four fourths before subtracting; the correct difference is 2 1/2.

Question 33 · error analysis

A student calculates 5 1/4 − 1 3/4 and writes 4 2/4. Identify the mistake and give the correct simplified answer.

Show answer & reasoning
3 1/2

Exchange one whole for four fourths, then subtract the whole and fractional parts. The difference is 3 1/2.