Question

直接寫出結(jié)果． 2 3 - 1 2 =	4.5×102=	341-103=	270÷18=
10×10%=	5-0.25+0.75=	0.42-0.32=	2÷ 1 5 =
5 9 ×6=	4.57+6.43=	7× 1 7 ÷7× 1 7 =	1÷ 4 5 × 3 5 =

Answer 1

分析：根據(jù)分?jǐn)?shù)加減法、小數(shù)的加減法、分?jǐn)?shù)的乘除法、小數(shù)乘法、整數(shù)的減法及除法的計(jì)算方法進(jìn)行計(jì)算即可得到答案．

解答：解：

2

3

-

1

2

=

1

6

        4.5×102=459        341-103=238              270÷18=15 
10×10%=1         5-0.25+0.75=5.5      0.4²-0.3²=0.07             2÷

1

5

=10

5

9

×6=3

1

3

           4.57+6.43=11        7×

1

7

÷7×

1

7

=

1

49

           1÷

4

5

×

3

5

=

3

4

點(diǎn)評(píng)：解答本題的關(guān)鍵是理解分?jǐn)?shù)加減法、分?jǐn)?shù)乘除法、小數(shù)乘法及平方的計(jì)算方法等方面的知識(shí)．