Question

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this math question help me​

Answer 1

a ) ( - 18 ) × ( - 10 ) × 9

180 × 9

1620

b ) ( - 20 ) × ( - 2 ) × ( - 5 ) × 7

40 ( - 5 ) × 7

- 200 × 7

- 1400

c ) ( - 1 ) × ( - 5 ) × ( - 4 ) × ( - 6 )

5 ( - 4 ) ( - 6 )

- 20 ( - 6 )

120