Question

直接寫(xiě)出得數(shù)．

3.3+1.67=	5.25×4=	6.3÷0.03=	0.4+0.31=
3.87+3.87×9=	6.23×65+6.23×35=	1÷ 1 2 =	15- 8 15 - 7 15 =
3 7 × 1 7 =	2 3 ÷7=

Answer 1

考點(diǎn)：小數(shù)的加法和減法,運(yùn)算定律與簡(jiǎn)便運(yùn)算,分?jǐn)?shù)乘法,分?jǐn)?shù)除法,小數(shù)乘法,小數(shù)除法

專(zhuān)題：運(yùn)算順序及法則,運(yùn)算定律及簡(jiǎn)算

分析：根據(jù)四則運(yùn)算的計(jì)算法則進(jìn)行計(jì)算即可求解．注意3.87+3.87×9，6.23×65+6.23×35根據(jù)乘法分配律計(jì)算，15-

8

15

-

7

15

根據(jù)減法的性質(zhì)計(jì)算．

解答： 解：

3.3+1.67=4.97	5.25×4=21	6.3÷0.03=210	0.4+0.31=0.71
3.87+3.87×9=38.7	6.23×65+6.23×35=623	1÷ 1 2 =2	15- 8 15 - 7 15 =14
3 7 × 1 7 = 3 49	2 3 ÷7= 2 21

點(diǎn)評(píng)：考查了四則運(yùn)算，關(guān)鍵是熟練掌握計(jì)算法則正確進(jìn)行計(jì)算．