Question

elimine os parêntese e calcule
a) 5-6-(+7)+1
b) -28+7+(+12)+(-1)-6
c) -21-7-6-(15)-2-(-10)
d) 10-(-8)+(-9)-(12)-6+5

Answer 1

A) 5-6-7+1 = -7
B) -28+7+12-1-6 = -16
C) -21-7-6-15-2+10 = -41
D) 10+8-9-12-6+5 = -4

Answer 2

a)5-6 (+7)+1
5-6-7+1
-18+1=-17
b) -28+7 (+12)+(-1)-6
-21+12-1-6=-16
c)-21-7-6 (15)-2-(-10)
-21-7-6-15-2+10
-51+10=-41
d) 10-(-8)+(-9)-(12)-6+5
10+8-9-12-6+5=-4