Question

A) calcule 4% de 20 reais.
B) calcule 9% de 120 reais
C) calcule 7% de 200 reais.
D) calcule 6% de 160 reais.​

Answer 1

Resposta:

$a = \frac{4}{100} \times 20= 20 \div 100 \times 4 = 0.2 \times 4 = 0.8$

$b = \frac{9}{100} \times 120 = 120 \div 100 \times 9 = 1.2 \times 9 = 10.8$

$c = \frac{7}{100} \times 200 = 200 \div 100 \times 7 = 2 \times 7 = 14$

$d = \frac{6}{100} \times 160 = 160 \div 100 \times 6 = 1.6 \times 6 = 9.6$