Question

1) Resolva as expressões numéricas:

A) (-4-6) : (-1-1)
B) (5+15) : (+2+3)
C) (-3+5) x (-4-6)
D) (-2+5) x (-5-3)
E) (-7-2) x (-3+2)
F) (-10+5) x (-2-3)
G) (-10+5) x (-4-2)

2) Calcule:

A) -5+2-3+4
B) -8-4+3+2
C) -10+5-3+2
D) -12-6+3+3
E) -18+2-5+4
F) -20-5-10+5
G) -30+20-10+5
H) -40+20-5+15

Answer 1

(-4-6)÷(-1-1)
10÷2 =5.....sinais iguais somam fica +
(5+15)÷(+2+3)
20 ÷ 5 =4
(-3+5)×(-4-6)
+2×-10 =- 20..sinais +-subtrai cons.sinal maior
(-2+5)×(-5-3)
3× -8 = -24
(-7-2)×(-3+2)
-9×-1=9....mult... --=+
(-10+5)×(-2-3)
-5 ×-5= 25
(-10+5)×(-4-2)
-5×-6 = 30
2 calcule
-5+2-3+4=-3-3+4...-6+4=-2
-8-4+3+2=-12+3..-9+2=-7
-10+5-3+2= -5-3..-8+2=-6
-12-6+3+3=-18+3...-15+3=-12
-20-5-10+5=-35+5=-30
-30+20-10+5=-10-10...-20+5=-15
-40+20-5+15=-20-5...-25+15=-10
observe bem os sinais se nao vc erra a operacao ok