Question

Resolva as expressões
-3+7.(-2)
20:(-2-8)+3
30+8:(-2)
3+6.2-15:(-3)

Answer 1

= - 3 + 7.(-2)


= - 3 - 14

= - 17

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
= 20 : (- 2 - 8)+3

= 20 : (-10) + 3

= - 2 + 3

= 1
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
= 30 + 8 : ( - 2)

= 30 - 4

= 26

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= 3 + 6 . 2 - 15 : ( - 3)

= 3 + 12 + 5

= 15 + 5

= 20