- A-8
- B-9
- C-7
- D-16
Step-by-Step Solution
The product 72 is positive, so the missing factor must be negative (same signs). 72 ÷ 9 = 8, so the missing integer is −8. Check: (−9) × (−8) = 72.
Answer: A) -8
Find the missing integer: (−9) × ___ = 72.
Class 7Integers (Extended)Integers
Key idea: Dividing integers
The sign rule for division is **the same as for multiplication**: same signs → positive, different signs → negative.
12 ÷ 4 = 3
(−12) ÷ (−4) = 3
12 ÷ (−4) = −3
(−12) ÷ 4 = −3
Also: integer ÷ 1 = the integer; integer ÷ itself = 1; **never divide by 0** — division by zero is undefined.
12 ÷ 4 = 3
(−12) ÷ (−4) = 3
12 ÷ (−4) = −3
(−12) ÷ 4 = −3
Also: integer ÷ 1 = the integer; integer ÷ itself = 1; **never divide by 0** — division by zero is undefined.
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