Question

resolva as multiplicaçores e divisoes com numero inteiro:
a)(-8) -(-2)= c)(+100) ÷ (-4)=




b)(-10) - (-2) -(-3) + (+1)= d)(-80) ÷ (-5)=



4-calcule:

a)1
_ de 1 = b)3÷1
_ _
5
2 2​

Answer 1

Resposta:

Explicação passo a passo:

a) -8+10=2

b)-70+40=-30

c)+20-500=-480

d)-1+100=99

2)

$\left(2\right)+\left(-8\right)+\left(7\right)-9+40\\\left(2\right)-8+\left(7\right)-9+40\\-6+\left(7\right)-9+40\1-9+40\\-8+40\32$

3)

a

$\left(-8\right)-\left(-2\right)\\-8+2\\-6$

b

$\left(-10\right)-\left(-2\right)-\left(-3\right)+\left(1\right)\\\left(-10\right)+2-\left(-3\right)+\left(1\right)\\-8-\left(-3\right)+\left(1\right)\\-8+3+\left(1\right)\\5+\left(1\right)\\-4$

c

$\frac{100}{-4}=-25$

d

$\frac{-80}{-5}=\frac{80}{5}=16$

4)

1\2 equivale a 0,5 entao 0,5+0,5= 1

b

$3\div \frac{1}{5}=\frac{3}{1}\div \frac{1}{5}=\frac{3}{1}\times \frac{5}{1}=3\times \:5=15$