Question

直接寫得數(shù) 2 5 + 1 4 =	8 9 ÷ 4 3 =	3 7 ÷ 1 6 =	2 3 × 1 2 =	7× 4 9 × 1 7 =
2 9 ÷4=	2 3 × 3 5 =	3- 3 8 =	7 12 × 3 14 =	6÷2.5+3.5=
5 12 ÷ 3 4 =	3 2 - 5 6 =	12× 1 4 =	51÷ 5 17 =	4 19 × 1 4 ÷ 4 19 =

Answer 1

考點(diǎn)：分?jǐn)?shù)的加法和減法,分?jǐn)?shù)乘法

專題：運(yùn)算順序及法則

分析：按照分?jǐn)?shù)四則計(jì)算的計(jì)算法則以及混合運(yùn)算的運(yùn)算順序直接計(jì)算得出答案即可．

解答：

解： 2 5 + 1 4 = 13 20	8 9 ÷ 4 3 = 2 3	3 7 ÷ 1 6 = 18 7	2 3 × 1 2 = 1 3	7× 4 9 × 1 7 = 4 9
2 9 ÷4= 1 18	2 3 × 3 5 = 2 5	3- 3 8 =2 5 8	7 12 × 3 14 = 1 8	6÷2.5+3.5=5.9
5 12 ÷ 3 4 = 5 9	3 2 - 5 6 = 2 3	12× 1 4 =3	51÷ 5 17 = 867 5	4 19 × 1 4 ÷ 4 19 = 1 4

點(diǎn)評：掌握計(jì)算法則和混合運(yùn)算的運(yùn)算順序是解決問題的關(guān)鍵．