Question

直接寫出得數(shù)． 2 3 × 6 5 =	4 5 + 1 10 =	4 9 - 1 3 =	1 2 × 3 5 =	3 7 × 1 6 =
2 5 + 1 2 =	35 38 × 19 14 =	5 12 ×15=	8 91 × 3 4 =	3 4 - 1 10 =

Answer 1

分析：依據(jù)分?jǐn)?shù)四則運(yùn)算的計(jì)算法則：兩個(gè)分?jǐn)?shù)相乘，可以先約分，再把分子相乘的積作分子，分母相乘的積作分母；除以一個(gè)數(shù)（0除外），就等于乘這個(gè)數(shù)的倒數(shù)；異分母分?jǐn)?shù)相加減，先通分，再根據(jù)同分母分?jǐn)?shù)的加、減法計(jì)算；即可逐題解答．

解答：解：

2 3 × 6 5 = 4 5	4 5 + 1 10 = 9 10	4 9 - 1 3 = 1 9	1 2 × 3 5 = 3 10	3 7 × 1 6 = 1 14
2 5 + 1 2 = 9 10	35 38 × 19 14 = 5 4	5 12 ×15= 25 4	8 91 × 3 4 = 6 91	3 4 - 1 10 = 13 20

點(diǎn)評(píng)：此題主要考查分?jǐn)?shù)四則運(yùn)算的計(jì)算法則的靈活應(yīng)用．