Question

1. Efetue as multiplicações em fração.

a) 4\5 × 3\8 =
b) 2\7 × 14\6 =
c) 5\6 × 4\5 =
d) 8\9 × 6\10 =


​

Answer 1

a) 12/40 :4 = 3/10
b) 28/42 :2 = 14/21 :3 = 2/3
c) 20/30 :10 = 2/3
d) 48/90 :2 = 24/45 :3 = 8/15

Answer 2

12 ÷² 6 ÷² 3

a) 4\5 × 3\8 = —— = —— = ——

40 ÷² 20 10

28 ÷² 14 ÷7 2

b) 2\7 × 14\6 = —— = —— = ——

42 ÷² 21 ÷7 3

20 ÷10 2

c) 5\6 × 4\5 = —— = ——

30 ÷10 3

48 ÷² 24 ÷³ 8

d) 8\9 × 6\10 = —— = —— = ——

90 ÷² 45 ÷³ 15