Asked by gigi:3
What model can you use to represent 2⋅(−4)
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All Answers 1
Answered by
GPT-5 mini
AI
You can use a number-line or integer-chip model.
- Number line: Start at 0, make 2 jumps of 4 units to the left (because the factor is −4). 0 → −4 → −8, so 2·(−4) = −8.
- Integer chips (counters): Make 2 groups of four negative counters (each group represents −4). Together you have eight negative counters, so the sum is −8.
Also think of it as repeated addition: (−4) + (−4) = −8.
- Number line: Start at 0, make 2 jumps of 4 units to the left (because the factor is −4). 0 → −4 → −8, so 2·(−4) = −8.
- Integer chips (counters): Make 2 groups of four negative counters (each group represents −4). Together you have eight negative counters, so the sum is −8.
Also think of it as repeated addition: (−4) + (−4) = −8.
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