Question

a) 16 + (-7 + 11 - 20) =

c) 100 - (70 + 20) + (-90 + 30) =

b) 20 - (7 + 28-31) =

d) - 11 - (-13-15 +26) =

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Answer 1

Resposta:

a) 16+(-7+11-20)

16-16

0

c) 100-(70+20)+(-90+30)

100-(90)-60

100+90-60

130

b) 20-(7+28-31)

20-(4)

20-4

16

d) -11-(-13-15+26)

-11-(2)

-11-2

-13