Question

直接寫得數(shù) 48× 3 4 =	25÷ 5 6 =	6+ 2 3 =	3 7 ÷ 3 5 =	5 6 ×4=
2 5 ÷ 3 4 =	9× 7 12 =	8÷ 2 5 =	4 5 ÷ 1 5 =	5 6 - 1 2 =
3 10 × 5 9 =	3 4 - 1 8 =	15 16 ÷5=	7 8 ÷ 1 2 =	4 7 × 3 4 =
91.5÷ 3 5 =	2÷ 2 5 =	0÷ 4 9 =	12× 5 6 =	0.4÷ 2 5 =
2 3 ÷ 2 7 =	3 8 × 4 9 =	1 6 ×9=	2 3 ÷4=	4.4×0.5=
6.4+0.43=	3.14×22=	3.14×102=	0.63÷0.7=	2.4÷0.8=
4×25%=	1-75%=	0.5×30%=	7.2-0.4=	3.4÷1.7=
0.18÷0.2=	9.42÷3.14=	21.98÷3.14=	2-2÷9=	3 16 × 2 9 =
4 12 ×4× 3 16 =	（ 1 2 + 1 3 ）×6=	（18- 9 20 ）÷9=	20÷ 8 9 ÷ 3 4 =	8.8÷0.25=
4 7 + 3 4 + 1 4 =	7 9 -（ 7 9 - 2 3 ）=	4.5×4.4+4.6×4.5=

Answer 1

考點：分數(shù)的加法和減法,分數(shù)乘法,分數(shù)除法,分數(shù)的四則混合運算,小數(shù)的加法和減法,小數(shù)乘法,小數(shù)除法

專題：運算順序及法則,運算定律及簡算

分析：（

1

2

+

1

3

）×6運用乘法分配律簡算；
（18-

9

20

）÷9先把除法變成乘法，再運用乘法分配律簡算；
20÷

8

9

÷

3

4

根據(jù)除法的性質(zhì)簡算；

4

7

+

3

4

+

1

4

根據(jù)加法交換律簡算；

7

9

-（

7

9

-

2

3

）根據(jù)減法的性質(zhì)簡算；
4.5×4.4+4.6×4.5根據(jù)乘法分配律簡算；
其它題目根據(jù)運算法則直接求解．

解答： 解：

48× 3 4 =36	25÷ 5 6 =30	6+ 2 3 =6 2 3	3 7 ÷ 3 5 = 5 7	5 6 ×4= 10 3
2 5 ÷ 3 4 = 8 15	9× 7 12 = 21 4	8÷ 2 5 =20	4 5 ÷ 1 5 =4	5 6 - 1 2 = 1 3
3 10 × 5 9 = 1 6	3 4 - 1 8 = 5 8	15 16 ÷5= 3 16	7 8 ÷ 1 2 = 7 4	4 7 × 3 4 = 3 7
91.5÷ 3 5 =152.5	2÷ 2 5 =5	0÷ 4 9 =0	12× 5 6 =10	0.4÷ 2 5 =1
2 3 ÷ 2 7 = 7 3	3 8 × 4 9 = 1 6	1 6 ×9= 3 2	2 3 ÷4= 1 6	4.4×0.5=2.2
6.4+0.43=6.83	3.14×22=12.56	3.14×102=314	0.63÷0.7=0.9	2.4÷0.8=3
4×25%=1	1-75%=0.25	0.5×30%=0.15	7.2-0.4=6.8	3.4÷1.7=2
0.18÷0.2=0.9	9.42÷3.14=3	21.98÷3.14=7	2-2÷9=1 7 9	3 16 × 2 9 = 1 24
4 12 ×4× 3 16 = 1 4	（ 1 2 + 1 3 ）×6=5	（18- 9 20 ）÷9=1 11 20	20÷ 8 9 ÷ 3 4 =30	8.8÷0.25=35.2
4 7 + 3 4 + 1 4 =1 4 7	7 9 -（ 7 9 - 2 3 ）= 2 3	4.5×4.4+4.6×4.5=40.5

點評：本題考查了簡單的運算，要注意根據(jù)運算法則和運算定律快速準確的得出答案．