Question

直接寫得數(shù) 1 4 ÷ 2 3 =	3 4 × 4 7 =	1 3 - 1 4 =	6÷ 1 8 =
5 12 × 5 6 =	32÷ 4 5 =	5- 1 2 =	5 14 ×35=

Answer 1

分析：分數(shù)乘整數(shù)，用分數(shù)的分子和整數(shù)相乘的積做分子，分母不變；分數(shù)乘分數(shù)，用分子相乘的積做分子，分母相乘的積做分母，能約分的要約分；分數(shù)除以一個數(shù)，等于乘這個數(shù)的倒數(shù)；異分母分數(shù)相加減，先依據(jù)分數(shù)的基本性質(zhì)化成同分母分數(shù)，再進行加減．

解答：解：

1 4 ÷ 2 3 = 3 8	3 4 × 4 7 = 3 7	1 3 - 1 4 = 1 12	6÷ 1 8 =48
5 12 × 5 6 = 25 72	32÷ 4 5 =40	5- 1 2 = 9 2	5 14 ×35= 25 2

點評：此題主要考查分數(shù)四則運算的計算法則的靈活應(yīng)用．