Question

直接寫得數(shù)． 1 3 ×0=	1 4 × 2 5 =	5 6 ×12=	7 12 × 3 14 =	45× 3 5 =
9× 7 18 =	2 3 × 9 10 =	4 25 ×100=	18× 1 6 =	4 11 × 11 4 =
8 15 ×5=	24× 3 8 =	1 7 × 2 3 =	7 18 × 9 14 =	2 39 × 13 1 =

Answer 1

考點(diǎn)：分?jǐn)?shù)乘法

專題：計算題

分析：根據(jù)分?jǐn)?shù)乘分?jǐn)?shù)的計算法則：分?jǐn)?shù)乘分?jǐn)?shù)，用分?jǐn)?shù)的分子相乘的積作分子，分母相乘的積作分母，能約分的先約分，再計算；分?jǐn)?shù)乘整數(shù)的計算法則：分?jǐn)?shù)乘整數(shù)，用分?jǐn)?shù)的分子和整數(shù)相乘的積作分子，分母不變，能約分的先約分，再計算．

解答：

解： 1 3 ×0=0	1 4 × 2 5 = 1 10	5 6 ×12=10	7 12 × 3 14 = 1 8	45× 3 5 =27
9× 7 18 =3 1 2	2 3 × 9 10 = 3 5	4 25 ×100=16	18× 1 6 =3	4 11 × 11 4 =1
8 15 ×5= 8 3	24× 3 8 =9	1 7 × 2 3 = 2 21	7 18 × 9 14 = 1 4	2 39 × 13 1 = 2 3

點(diǎn)評：明確分?jǐn)?shù)乘分?jǐn)?shù)的計算法則及分?jǐn)?shù)乘整數(shù)的計算法則，是解答此的關(guān)鍵．