Question

efetue as subtrações:
a -21-6-7-(-15)-2-(-10)
b 15-2-6-(+3)-(-1)
c -45+7+8(-8)+(-3)-2-4+1
d 20-(-5)-12-1-(-3)
e 10-(-12)-(-8)+(-9)-6+1+5
f 18-(-18)+7-(-7) +0-4

Answer 1

A) -11
B) 5
C) -110
D) 15
E) 21
F) 46

Answer 2

a -21-6-7-(-15)-2-(-10)
=-27-7+15-2+10
=-34+15-2+10
=-19-2+10
=-21+10
=-11

b 15-2-6-(+3)-(-1)
=13-6-3+1
=7-3+1
=4+1
=5

c -45+7+8(-8)+(-3)-2-4+1
=-38-64-3-2-4+1
=-102-3-2-4+1
=-105-2-4+1
=-107-4+1
=-111+1
=-110

d 20-(-5)-12-1-(-3)
=20+5-13+3
=25-10
=15

e 10-(-12)-(-8)+(-9)-6+1+5
=10+12+8-9-6+1+5
=22-1-6+6
=21

f 18-(-18)+7-(-7) +0-4
=18+18+7+7-4
=36+14-4
=36+10
=46