Question

Evaluate:
(i) 8 + (−16)
(ii) (−5) + (−6)
(iii) (−6) × (−8)
(iv) (−36) ÷ 6
(v) 30 − (−50)
(vi) (−40) ÷ (−10)
(vii) 8 × (−5)
(viii) (−30) − 15

Answer 1

(i) 8 + (–16)
= 8 – 16
= –8

(ii) (–5) + (–6)
= –5 – 6
= –11

(iii) (–6) × (–8)
= (6 × 8)
= 48

(iv) (–36) ÷ 6
$$\begin{gathered} \frac{-36}{6} \\ =(-1)\times \frac{36}{6} \\ =-6 \end{gathered}$$
(v)
30 – (–50)
= 30 + 50
= 80

(vi) (–40) ÷ (–10)
$\begin{array}{l}=\frac{-40}{-10}\\ =\frac{(-1)\times 40}{(-1)\times 10}\\ =4\end{array}$

(vii) 8 × (–5)
= –(8 × 5)
= –40

(viii) (–30) – 15
= –30 – 15
= –45