Question

計(jì)算題

11 12 × 8 9	7 8 × 11 9	3 4 ×1
1 3 × 8 3	13× 9 13	66 13 ×12
6 5 × 2 15	2 15 ÷ 5 4	9 10 ÷ 9 10
5 7 × 1 4	1 3 + 4 7 + 2 3 + 1 7	4 5 × 3 8 × 5 9
101× 1 7	6 47 ×48	1 7 ×34×7
1 4 × 3 5 ÷ 9 8	3 5 ÷ 1 20 ÷ 3 4	6 47 ÷ 5 6
5 8 ÷（ 1 2 + 1 4 ）	8 13 ÷ 6 13	1 8 ÷ 5 12 ．

Answer 1

考點(diǎn)：分?jǐn)?shù)乘法,分?jǐn)?shù)除法

專題：計(jì)算題

分析：根據(jù)四則運(yùn)算的計(jì)算法則計(jì)算即可求解．注意

1

3

+

4

7

+

2

3

+

1

7

先計(jì)算同分母分?jǐn)?shù)，

66

13

×12和

6

47

×48根據(jù)乘法分配律計(jì)算，

1

7

×34×7根據(jù)乘法交換律和結(jié)合律計(jì)算．

解答： 解：

11 12 × 8 9 = 22 27	7 8 × 11 9 = 77 72	3 4 ×1= 3 4
1 3 × 8 3 = 8 9	13× 9 13 =9	66 13 ×12=60 12 13
6 5 × 2 15 = 4 25	2 15 ÷ 5 4 = 8 75	9 10 ÷ 9 10 =1
5 7 × 1 4 = 5 28	1 3 + 4 7 + 2 3 + 1 7 =1 5 7	4 5 × 3 8 × 5 9 = 1 6
101× 1 7 =14 3 7	6 47 ×48=6 6 47	1 7 ×34×7=34
1 4 × 3 5 ÷ 9 8 = 2 15	3 5 ÷ 1 20 ÷ 3 4 =16	6 47 ÷ 5 6 = 36 235
5 8 ÷（ 1 2 + 1 4 ）= 5 6	8 13 ÷ 6 13 =1 1 3                      1 8 ÷ 5 12 = 3 10

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．