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Adding and Subtracting Integers Test Answer Key with Scoring – Grade 7

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Last updated: October 22, 2026 · Written by the Math Made Easy math teachers

Grade 7 Math Test Answer Keys – Mathbot, the Math Made Easy robot coach, with free printable test answer keys for Grade 7

Looking for an adding and subtracting integers test answer key? Then this answer key gives the solutions and the scoring guide of the Grade 7 test on Adding and Subtracting Positive and Negative Numbers. Use the scoring notes under each solution. Give partial credit when the size of the answer is right but the sign is wrong, and when the work shows the correct rewrite of the subtraction.

Standards: 7.NS.A.1a, 7.NS.A.1b, 7.NS.A.1c, 7.NS.A.1d · Level: Grade 7

Question 2 Subtracting Integers (2 points)

(a) 6 + (−15) = −9.

(b) −8 + 13 = 5.

−9 and 5

Scoring: 1 point per part.

Question 3 Number Line Model (3 points)

(a) −5 + 8 = 3.

(b) 3 − 8 = 3 + (−8) = −5.

(c) |3 − (−5)| = 8.

−8−7−6−5−4−3−2−10123456add −83−5
3 − 8 = 3 + (−8) = −5.

−5 + 8 = 3; −5; 8

Scoring: 1 point per part.

Question 4 Night and Day Temperatures (3 points)

(a) 9 − (−12) = 21.

(b) 9 − 15 = −6.

(c) |−6 − (−12)| = 6.

21°F; −6°F; 6 degrees

Scoring: 1 point per part.

Question 5 Decimals and Fractions (3 points)

(a) 6.5 − 2.8 = 3.7.

(b) −1.4 + (−3.9) = −5.3.

(c) −812 + 312 = −512.

3.7; −5.3; −512

Scoring: 1 point per part.

Question 6 Gull and Fish (3 points)

(a) Gull: 32, fish: −18. Distance: |32 − (−18)| = 50 m.

(b) −18 + 27 = 9.

(c) 32 − 9 = 23 m.

−20−10010203040distance 5032−18
Distance = |32 − (−18)| = 50.

50 m; 9; 23 m

Scoring: 1 point per part.

Question 7 Debt and Deposit (2 points)

(a) A deposit equal to the opposite of −62.50: −62.50 + 62.50 = 0, so $62.50.

(b) −31 + 31 = 0, and 0 + (−4) = −4.

$62.50; −4

Scoring: 1 point per part.

Question 8 Find the Unknown (2 points)

(a) ? = 4 − (−9) = 13.

(b) 5 + (−?) = 12, so −? = 7 and ? = −7. Check: 5 − (−7) = 12.

13 and −7

Scoring: 1 point per part.