GB-02-03-001 · Multiplying and dividing negatives

Work out

(a) $(-20)\times(-16)$

(b) $(-320)\div16$

Part (a) Multiplying & Dividing Negative Numbers Application of related method — Booklet p. 3

Method

1) Multiply/divide the absolute values

2) Same signs give positive (− × − = +); different signs give negative

Worked Example (GB-02-03-001 · Part (a))

(-20)\times(-16)

320

Ans =

320

Part (b) Multiplying & Dividing Negative Numbers Application of related method — Booklet p. 3

Method

1) Multiply/divide the absolute values

2) Same signs give positive (− × − = +); different signs give negative

Worked Example (GB-02-03-001 · Part (b))

(-320)\div16

-20

Ans =

-20