Efetue:
A)(-46+(-52)+(+31)-(-1)+(+63)
B)(45-9):(-30+21)+(-8)
C)28:(79-93)+(-65-31):(18-42)
A)(-46+(-52)+(+31)-(-1)+(+63)
B)(45-9):(-30+21)+(-8)
C)28:(79-93)+(-65-31):(18-42)
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-46-52+31+1+63=
-98 + 95 = - 3
B)(45-9):(-30+21)+(-8)=
(36):(-9)+(-8)=
-4-8= - 12
C)28:(79-93)+(-65-31):(18-42)=
28:(-14)+(-96):(-24)=
- 2+( 4) =
-2+4 = 2
Um abraço.