Question

直接写得数．

24× 1 2 =	18× 7 9 =	7 8 × 5 14 =	9× 3 4 =
2 3 × 3 7 =	1 3 × 5 7 =	3 4 × 4 15 =	3 5 × 5 14 × 14 5 =

Answer 1

分析：分数乘法：分子相乘的积做分子，分母相乘的积做分母，能约分的先约分．

解答：解：

24× 1 2 =12	18× 7 9 =14	7 8 × 5 14 = 5 16	9× 3 4 = 27 4
2 3 × 3 7 = 2 7	1 3 × 5 7 = 5 21	3 4 × 4 15 = 1 5	3 5 × 5 14 × 14 5 = 3 5 ．

点评：本题考查了简单的分数乘法的计算，计算时要细心，注意把结果化成最简分数．