8 - 9

(a)  

(-4) × (-3)

(a)  

100 ÷ (-10)

(a)  

$$\sqrt[]{144}$$

(a)  

-2 + 17

(a)  

-19 - 5

(a)  

$$-\frac{1}{3}$$ × 21

(a)  

$$\left(-2\right)^3$$

(a)  

-7 + 4

(a)  

18 - 20

(a)  

5 × -12

(a)  

33 ÷ (-3)

(a)  

$$\left(-7\right)^2$$

(a)  

-2 + (-3)

(a)  

11 - 7

(a)  

$$\frac{1}{5}$$ of -15

(a)