Question

Se 1 quilograma de banana e R$ 8,70, quanto e 0,8 kg?
E se 1 kilos de taperebá e R$ 4,20 quanto e 2,1kg?

Answer 1

Explicação passo a passo:

1 kg >>>>>>>>>>>>>>>>>>8,70

0,8 kg>>>>>>>>>>>>>>> x

1/0,8 = 8,70/x

em cruz

1 * x = 0,8 * 8.70

x =6,96 >>>>>resposta

b

1kg >>>>>>>>>>>>>>>>>>>>>>>>>4,20

2,1 kg >>>>>>>>>>>>>>>>>>>>>>> x

1/2.1 = 4,20/x

1 * x = 2,1 * 4,20

x = 8,82 >>>>>>>>>resposta