Question

se alguém poder, responder a 8,9 e 10!!!!!

Answer 1

questao 8- a)
$1 = 1.40 \\ 2 = 2.80 \\ 3 = 4.20 \\ 10 = 14 \\ 15 = 21 \\ 86 = 120.40$
b)
$2.80 = 1.40 \times 2 \\ 4.20 = 1.40 \times 3 \\ 14 = 1.40 \times 10 \\ 21 = 1.40 \times 15 \\ 120.40 = 1.4 0 \times 86$
c)
$224 \div 1.40 = 160$