Question

efetue as subtrações: a)7-(-3)-1
b)25-(-6)-(-8) c)15-2-6-(+3)-(-1) d)20-(-5)-12-1-(-3)
e) 18-(-18)+7-(-7)+0-4
f)-21-6-7-(-15)-2-(-10)
g)-45+7+(-8)+(-3)-2-4+1
​

Answer 1

a) 7-(-3)-1

7+3-1

9

b) 25-(-6)-(-8)

25+6+8

39

c) 15-2-6-(+3)-(-1)

15-2-6-3+1

16-11

5

d) 20-(-5)-12-1-(-3)

20+5-12-1+3

28-13

15

e) 18-(-18)+7-(-7)+0-4

18+18+7+7-4

50-4

46

f) -21-6-7-(-15)-2-(-10)

-21-6-7+15-2+10

-36+25

-11

g) -45+7+(-8)+(-3)-2-4+1

-45+7-8-3-2-4+1

-62+8

-54