Answer:
I hope this answer will help you
a)42+(-17) b)8-(-9) c)8(-9) d)-42+(-7)
=42-17 =8+9 =(-72) =-42-7
=25 =17 =-49
e)-2(-3)(-4) f)-18-7 g)(-5)^2 h)-5^2
=-2*12 =-25 =25 =25
=24
i)ans
7
