Question

直接寫出得數(shù)

6 11 + 5 11 =	1 6 +7=	5 8 - 3 8 =	1 4 - 1 7 =
7 8 + 1 2 =	3 4 + 1 6 =	5 6 - 1 3 =	1- 4 5 + 1 5 =
m-0.6m=	4- 4 9 = 7 12 + 1 4 =	3 7 + 9 17 + 4 7 =	26÷39=0.23=
7t-5t=	4 5 -（ 1 4 - 1 5 ）=

Answer 1

考點(diǎn)：分?jǐn)?shù)的加法和減法,運(yùn)算定律與簡便運(yùn)算,分?jǐn)?shù)的四則混合運(yùn)算,有理數(shù)的乘方

專題：計(jì)算題

分析：根據(jù)分?jǐn)?shù)加減法和小數(shù)加減乘除法的計(jì)算方法進(jìn)行計(jì)算；

3

7

+

9

17

+

4

7

根據(jù)加法交換律進(jìn)行簡算；

4

5

-（

1

4

-

1

5

）根據(jù)減法的性質(zhì)進(jìn)行簡算．

解答： 解：

6 11 + 5 11 =1	1 6 +7=7 1 6	5 8 - 3 8 = 1 4	1 4 - 1 7 = 3 28
7 8 + 1 2 = 11 8	3 4 + 1 6 = 11 12	5 6 - 1 3 = 1 2	1- 4 5 + 1 5 = 2 5
m-0.6m=0.4m	4- 4 9 =3 5 9       7 12 + 1 4 = 5 6	3 7 + 9 17 + 4 7 =1 9 17	26÷39= 2 3     0.23=0.008
7t-5t=2t	4 5 -（ 1 4 - 1 5 ）= 3 4

點(diǎn)評：口算時(shí)，注意運(yùn)算符號和數(shù)據(jù)，然后再進(jìn)一步計(jì)算．