Question

直接寫得數(shù) 3 4 ×2=	18× 5 9 =	8 9 - 5 6 =	7 8 ÷ 7 16 =
2 3 ÷ 4 9 =	5 7 × 3 5 =	5÷ 5 12 =	2 3 ÷2=
7 12 × 3 7 - 1 4 =	12÷ 3 4 + 2 5 =	1- 4 5 × 3 4 =	（ 1 6 + 1 8 ）×24=

Answer 1

考點：分?jǐn)?shù)乘法,運算定律與簡便運算,分?jǐn)?shù)除法,分?jǐn)?shù)的四則混合運算

專題：計算題

分析：本題根據(jù)分?jǐn)?shù)乘法、除法、加法與減法的運算法則計算即可．
（

1

6

+

1

8

）×24可根據(jù)乘法分配律計算．

解答： 解：

3 4 ×2= 3 2	18× 5 9 =10	8 9 - 5 6 = 1 18	7 8 ÷ 7 16 =2
2 3 ÷ 4 9 = 3 2	5 7 × 3 5 = 3 7	5÷ 5 12 =12	2 3 ÷2= 1 3
7 12 × 3 7 - 1 4 =0	12÷ 3 4 + 2 5 =16 2 5	1- 4 5 × 3 4 = 2 5	（ 1 6 + 1 8 ）×24=7

點評：完成分?jǐn)?shù)乘除法算式時要細(xì)心，注意約分．