Question

（2010?尤溪縣模擬）

12.5×8=	3.4÷ 2 5 =	7 9 × 3 7 =	0.125×7×8=
1÷ 3 8 =	2 9 +1 2 3 =	3 4 - 2 3 =	（1 5 7 - 5 6 )×0+3 1 2 =

Answer 1

分析：根據(jù)分數(shù)、小數(shù)加減乘除的計算法則計算即可．同時“0.125×7×8=”可以使用簡便算法．

解答：解：①12.5×8=100
②3.4÷

2

5

 
=3.4÷0.4
=8.5
③

7

9

×

3

7

=

1

3

④0.125×7×8
=（0.125×8）×7
=1×7
=7
⑤1÷

3

8

=1×

8

3

=2

2

3

⑥

2

9

+1

2

3

=

2

9

+

15

9

=1

8

9

⑦

3

4

-

2

3

=

9

12

-

8

12

=

1

12

⑧（1

5

7

-

5

6

)×0+3

1

2

=

12

7

-

5

6

=

72

42

-

35

42

=

37

42

點評：此題主要考查分數(shù)的加減乘除的計算和小數(shù)乘法．