Question

Question 4
Starting from (−1) $\times$ 5 ,write various products showing a pattern to show (−1) $\times$ (−1)=1.

Answer 1

- 1 $\times$ 5 = - 5
- 1 $\times$ 4 = - 4 = - 5 + 1
- 1 $\times$ 3 = - 3 = - 4 + 1
- 1 $\times$ 2 = - 2 = - 3 + 1
- 1 $\times$ 1 = - 1 = - 2 + 1
- 1 $\times$ 0 = 0 = - 1 + 1
Therefore, - 1 $\times$ (- 1) = 0 + 1 = 1