Question

直接寫(xiě)得數(shù)． 1 3 ×0=	1 4 × 2 5 =	5 6 ×12=	7 12 × 3 14 =	4.5× 3 5 =	9× 7 18 =
2 3 × 9 10 =	4 25 ×100=	18× 1 6 =	4 11 × 11 4 =	6 65 ×9.1=	1.21× 3 22 =

Answer 1

考點(diǎn)：分?jǐn)?shù)乘法

專題：運(yùn)算順序及法則

分析：分?jǐn)?shù)乘整數(shù)，用分?jǐn)?shù)的分子和整數(shù)相乘的積做分子，分母不變；分?jǐn)?shù)乘分?jǐn)?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；0乘任何數(shù)都得0．

解答： 解：

1 3 ×0=0	1 4 × 2 5 = 1 10	5 6 ×12=10	7 12 × 3 14 = 1 8	4.5× 3 5 =2.7	9× 7 18 = 7 2
2 3 × 9 10 = 3 5	4 25 ×100=16	18× 1 6 =2	4 11 × 11 4 =1	6 65 ×9.1=0.84	1.21× 3 22 =0.165

點(diǎn)評(píng)：此題主要考查分?jǐn)?shù)乘法的運(yùn)算法則的理解和靈活應(yīng)用．