Worked example
Find (-3) × (4).
Answer & why
Answer: -12
Multiply the magnitudes: 3 × 4 = 12. Different signs give a negative product, -12.
Grade 7 · Math
Multiply positive and negative integers
Use the sign rule and multiplication facts to multiply signed integers.
6 authored questions + worked example
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All questions
All 6 authored questions for this skill.
Question 1
Find (7) × (-2).
- -15
- -12
- -14
- -13
A hint
Multiply magnitudes first. Same signs give a positive product; different signs give a negative product.
Answer & why
Answer: -14
Multiply the magnitudes: 7 × 2 = 14. Different signs give a negative product, -14.
Question 2
Find (-8) × (3).
- -23
- -25
- -22
- -24
A hint
Multiply magnitudes first. Same signs give a positive product; different signs give a negative product.
Answer & why
Answer: -24
Multiply the magnitudes: 8 × 3 = 24. Different signs give a negative product, -24.
Question 3
Find (-4) × (-9).
- 36
- 37
- 38
- 35
A hint
Multiply magnitudes first. Same signs give a positive product; different signs give a negative product.
Answer & why
Answer: 36
Multiply the magnitudes: 4 × 9 = 36. Matching signs give a positive product, 36.
Question 4
Find (6) × (-7).
- -41
- -42
- -43
- -40
A hint
Multiply magnitudes first. Same signs give a positive product; different signs give a negative product.
Answer & why
Answer: -42
Multiply the magnitudes: 6 × 7 = 42. Different signs give a negative product, -42.
Question 5
Find (-3) × (4).
- -11
- -10
- -12
- -13
A hint
Multiply magnitudes first. Same signs give a positive product; different signs give a negative product.
Answer & why
Answer: -12
Multiply the magnitudes: 3 × 4 = 12. Different signs give a negative product, -12.
Question 6
Find (-5) × (-6).
- 31
- 29
- 32
- 30
A hint
Multiply magnitudes first. Same signs give a positive product; different signs give a negative product.
Answer & why
Answer: 30
Multiply the magnitudes: 5 × 6 = 30. Matching signs give a positive product, 30.