Question

*15 PONTOS*

Calcule :

a) (+9) + (-3)

b) (-9) + (+3)

c) (-4) + (-8)

d) (-2) + (+5)

___________

Efetue : (-723) + (+723) + (-1)

______________________

Use a propriedade de cancelamento para calcular :

a) 19- 9+ 5 + 4 - 7 + 31 + 9 - 6 +2-11;

b) 999+ 107- 1993+ 1993+1-107 +54.

ME AJUDEM PRFV

Answer 1

a) +6
b) -6
c) -12
d) +3
_____________

-1
_____________

a) 19-9+9= 19+5+4+31+2 = 61-7-6-11= 37
b) 107-107= 0 + 1993 -1993 = 999+1= 1000+54= 1054