题目内容

(2010?尤溪县模拟)

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
=
分析:根据分数、小数加减乘除的计算法则计算即可.同时“0.125×7×8=”可以使用简便算法.
解答:解:①12.5×8=100
②3.4÷
2
5
 
=3.4÷0.4
=8.5
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

2
9
+1
2
3

=
2
9
+
15
9

=1
8
9

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
点评:此题主要考查分数的加减乘除的计算和小数乘法.
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