Question

elimine os parêntese e os cochetes e calcule o valor de a) 35+[-21-(-12+2) b) -20-[21+(-20+4)+11] c) -(-30)-[20+(35-31+4)-36]​

Answer 1

Resposta:

35+[-21+10]=

35-11= 24

-20-[21-16+11]=

-20+37-11= 6

30-[20+8-36]=

30+8= 38

Answer 2

A) 35+ -21 - (-12 + 2)

35+ -21 - (-14)

-14 - (-14)

+28

B) -20 -21 + (-20 + 4) +11

-20 -21 + (-16) +11

+41 + (-16) +11

+57 +11

+68

C) - (-30) - 20+ (35- 31+4) -36

- (-30) - 20+ ( +8) -36

-50+ (+8) -36

-42 -36

+78