Question

(a) 25+ (-35)-(-85)
(b) 45-(+65)+ (75)
(c) 9o+(-85) + 90
(d) -105+ (-120)-(-135)​

Answer 1

Step-by-step explanation:

a)

$25 + ( - 35) - ( - 85) \\ = 25 - 35 + 85 \\ = 25 + 50 \\ = 75$

b)

$45 - ( + 65) + (75) \\ = 45 - 65 + 75 \\ = 45 + 10 \\ = 55$

c)

$90 + ( - 85) + 90 \\ = 90 - 85 + 90 \\ = 15 + 90 \\ = 105$

d)

$- 105 + ( - 120) - ( - 135) \\ = - 105 - 120 + 135 \\ = - 105 + 15 \\ = - 90$