Question

2. Resolva as expressões:
3+(-10)+(+7)-(-3) +15
b. (+4) - (+ 3) +(-8)-(-6)+(+12)
C.(-20) + (-15)+ (+30) - (-40)
(-90)+(+30)-(-50)+(-80)​

Answer 1

→ Cálculo :

A) 3 + ( - 10 ) + ( + 7 ) - ( - 3 ) + 15

3 - 10 + 7 + 3 + 15

28 - 20

18

B) ( + 4 ) - ( + 3 ) + ( - 8 ) - ( - 6 ) + ( + 12 )

4 - 3 - 8 + 6 + 12

22 - 3 - 8

22 - 11

11

C) ( - 20 ) + ( - 15 ) + ( + 30 ) - ( - 40 )

-20 - 15 + 30 + 40

-35 + 30 + 40

-35 + 70

35

D) ( - 90 ) + ( + 30 ) - ( - 50 ) + ( - 80 )​

-90 + 30 + 50 - 80

-170 + 30 + 50

-170 + 80

-90