Question

8) Calcule mentalmente: a) 50 : (7 - 12) = b) ( 20 – 14): (-2) = c) ( 35 – 15): 4 = d) ( 7 - 3 - 10): (5 - 6 ) =​

Answer 1

Oie, tudo bom?

a)

$= 50 \div (7 - 12) \\ = 50 \div ( - 5) \\ \boxed{ = - 10}$

b)

$= (20 - 14) \div ( - 2) \\ = 6 \div ( - 2) \\ \boxed{ = - 3}$

c)

$= (35 - 15) \div 4 \\ = 20 \div 4 \\ \boxed{ = 5}$

d)

$= (7 - 3 - 10) \div (5 - 6) \\ = - 6 \div ( - 1) \\ \boxed{ = 6}$

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