Question

a) 12-(-10+5+2)

b)-25[-8+(-15+9)]

c) -77+{44+[29-(40-31+9)]}

d)9-(-7+15)+(18-9)

e) -1-1-1-1-1-1-1

f)0-2-3-2-3-1


me ajudem porfavor!

Answer 1

a) 15
b) -39
C)-22
d)10
e)-7
f)-11

Answer 2

a) 12 + 10 - 5 - 2 =
22 - 5 - 2
22 - 7
= 15

b) - 15 + 9 = 6
- 8 + 6 = 2
- 25 - 2
= - 27

c) - 40 + 31 = - 9
= - 18
= 29 - 18
= 11 + 44 = 55
= - 77 + 55
= - 22

d) 9 + 7 - 15 + 18 - 9
16 - 15 = 1
+ 18 = 19
19 - 9
= 10

e) - 1 - 1 = - 2
- 1 - 1 - 1 - 1 - 1 - 1 - 1 = - 7

f) - 2 - 3 = - 5
+ (- 2) = - 7
+ (- 3) = - 10
+ (- 1) = - 11