Question

Determine o valor de cada expressão numérica:

a) 19–(–20)÷(–2)=

b) (–56)÷(+8)+(–49)÷(–7)=

c) 50–72÷(+2)=

d) (–38)÷(+2)+(–42)÷(–3)=​

Answer 1

A)

19 - (-20) ÷ - 2 =

19+20 ÷ - 2 =

19 - 10 =

9

B)

(-56)÷(+8)+(-49)÷(-7) =

-56÷8-49÷-7 =

-7+7 =

0

C)

50-72÷(+2) =

50-72÷2 =

50-36 =

14

D)

(-38)÷(+2)+(-42)÷(-3) =

-38÷2-42÷-3 =

-19+14 =

-5

Answer 2

Resposta:

a) 9

b) 0

c) 14

d) -5

Explicação passo-a-passo:

$a)19 - ( - 20) \div ( - 2) \\ 19 + 20 \div ( - 2) \\ 19 - 10 \\ 9$

$b)( - 56) \div 8 + ( - 49) \div ( - 7) \\ - 7 + 7 \\ 0$

$c)50 - 72 \div 2 \\ 50 - 36 \\ 14$

$d)( - 38) \div 2 + ( - 42) \div ( - 3) \\ - 19 + 14 \\ - 5$