Question

efetue os cálculos expressos numéricas
a)20.2-30:3+7
b)32+4-[(+20):(-4)+3]
c)67+[50.[(+70):(27+8)+18:2]+21]


por favor​

Answer 1

a)20.2-30÷3+7

=40-10+7

=30+7

=37

b) 32+4-[(+20)÷(-4)+3]

=32+4-(-5)+3

=36-(-2)

=34

c) 67+[50×[(+70)÷(27+8)+18÷2]+21

=67+[50×[70÷35+9]+21

=67+[50×2+9]+21

=67+[100+9]+21

=67+109+21

=176+21

=197