Question

8. What is the value of:
a) 43 + 613- (-11)
b) (-22)-[(-23) - {(-17) -(-61)}]
c) 9 X (-2) X (-5)
d) 0 = (-12)
e) [(-64) = 8] = 4​

Answer 1

Step-by-step explanation:

$\sf a) \: 43 + 613- (-11) \\ = 43 + 613 + 11 \\ = 43 + 624 \\ = 667 \\ \\\sf b) \: (-22)-[(-23) - {(-17) -(-61)}] \\ = (- 22) - [- 23 + 17 + 61] \\ = (- 22) - [ - 23 + 78] \\ = (- 22) - 55 \\ = -7 7\\ \\\sf c) \: 9 x (-2) x (-5) \\ = - 18x( - 5x) \\ = 90 {x}^{2} \\ \\ \sf d) \: 0 = (-12) \\ 0 + 12 = 0 \\ 12 = 0 \\ \\ \sf e) \:[(-64) = 8] = 4 \\ [ - \cancel{64} =\cancel 8 ]= 4 \\ - \cancel 8 = \cancel 4 \\ - 2 = 0 \\ 0 + 2 = 0 \\ 2 = 0$