Question

3 5 × 3 13 =	3 4 × 5 24 =	1 3 × 6 7 =
7 12 × 8 21 =	9 55 × 11 81 =	3 8 × 4 27 =

Answer 1

分析：本题根据分数乘法的运算法则计算即可．

解答：解：

3 5 × 3 13 = 39 65	3 4 × 5 24 = 5 32	1 3 × 6 7 = 2 7
7 12 × 8 21 = 2 9	9 55 × 11 81 = 1 45	3 8 × 4 27 = 1 18

点评：完成分数乘法算式时要细心，注意约分．