Question

1)complete cada cálculo com o numero adequado a)2+(-3)-2= b)10+( ___ )+2=10 c) -21 -3+(-5)+35= d)___+(-4) - 3= -11 e)8 - (___)=7-(-2)

Answer 1

Olá,

Vamos lá,

a)2+(-3)-2=
= 2 - 3 - 2
= -3

b)10+( ___ )+2=10
10 + x + 2 = 10
x = 10 - 10 - 2
x = -2

c) -21 -3+(-5)+35=
= -21 - 3 - 5 + 35
= 6
d)___+(-4) - 3= -11
 x - 4 - 3 = -11
x = -11 + 3 + 4
x = -4


e)8 - (___)=7-(-2)
8 - x = 7 -(-2)
8 - x = 7 + 2
-x = 7 + 2 - 8
- x = 1
x = -1