Question

Explain why (−4) × (−5) = 20. Use patterns, an example from the Integer Game, or the properties of operations to support your reasoning.

Answer 1

Step-by-step explanation:

While doing multiplication we use the following rules :

1. minus multiply plus = minus

2. minus multiply minus = plus

3. plus multiply minus = minus

4. plus multiply plus = plus

that's why using 2nd rule we can write

(-4)×(-5)= 20