Worked examples
Two examples
Example 1
(−2) × (−3) × (−5) =
- Count the negatives: three, an odd number, so the answer is negative.
- 2 × 3 × 5 = 30.
Answer: −30
Example 2
(−1) × 4 × (−5) =
- Two negatives, an even number: positive.
- 1 × 4 × 5 = 20.
Answer: 20
Where this is taught: Signed Numbers, Part 10
The drill
Ten problems
How many:
Type each answer, then press Check my answers at the bottom. For a minus sign, the hyphen key (-) is fine.Write each answer on the line. The answer key, with the reasoning, is on the last page.