Question

-1 +2 –(-7 +8 -3) =
-4 – (-1 + 3 -5 – 9) =
+8 + (+6 -9 =1 +5) =
+7-1 =4 –(-5 + 9) =
-6 + (-1 -2 +3) – (4) =
??
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Answer 1

Resposta:

-1 +2 –(-7 +8 -3)

-1+2-(-2)

-1+2+2

3

-4 – (-1 + 3 -5 – 9)

-4-(-12)

-4+12

8

+8 + (+6 -9-1 +5)

8+(1)

9

+7-1 =4 –(-5 + 9)

7-1-4-(4)

7-1-4-4

-2

-6 + (-1 -2 +3)-(4)

-6+0-4

-10

Espero ter ajudado :)