Question

Can you work the multiplication out in your head?

(i) 3 × (−4)

(ii) 4 × (−3)

(iii)

(iv)

(v)

(vi) 3 × (−0.3)

(vii) 20 × (−0.4)

(viii) 9 × (−0.1)

Answer 1

(i)

3 × (−4) = −(3 × 4)

= −12

(ii)

4 × (−3) = −(4 × 3)

= −12

(iii)

2 × = −

= −1

(iv)

6 × = −

= −2

(v)

20 × = −

= −4

(vi)

5 × (−0.3) = −(5 × 0.3)

=

=

= −1.5

(vii)

20 × (−0.4) = −(20 × 0.4)

=

= −8

(viii)

9 × (−0.1) = −(9 × 0.1)

=

= −0.9