Question

口算 3÷ 2 3 =	8 11 ×11÷ 8 11 ×11=	63 2 7 × 7 9 =	1÷ 1 4 - 1 4 =	5 8 × 2 3 =
5× 4 15 ×0.4=	2 9 ÷ 3 5 =	3 8 ÷24=	1 2 × 2 3 ÷ 1 2 =	5÷ 1 5 ×5÷ 1 5 =

Answer 1

考點(diǎn)：分?jǐn)?shù)的四則混合運(yùn)算,分?jǐn)?shù)乘法

專(zhuān)題：運(yùn)算順序及法則

分析：按照分?jǐn)?shù)四則運(yùn)算的計(jì)算法則和混合運(yùn)算順序直接計(jì)算得出結(jié)果即可；63

2

7

×

7

9

利用乘法分配律簡(jiǎn)算．

解答：

解：3÷ 2 3 = 9 2	8 11 ×11÷ 8 11 ×11=121	63 2 7 × 7 9 =49 2 9	1÷ 1 4 - 1 4 =3 3 4	5 8 × 2 3 = 5 12
5× 4 15 ×0.4= 8 15	2 9 ÷ 3 5 = 10 27	3 8 ÷24= 1 64	1 2 × 2 3 ÷ 1 2 = 2 3	5÷ 1 5 ×5÷ 1 5 =625

點(diǎn)評(píng)：分?jǐn)?shù)混合運(yùn)算的關(guān)鍵是抓住運(yùn)算順序，正確利用運(yùn)算定律簡(jiǎn)算．