问题 解答题
你认为怎样简便就怎样算:
(1)12×
6
5
÷
3
10

(2)(25+
3
4
)÷
1
4

(3)12×
5
6
-
2
5
÷4
(4)(
1
3
-
1
4
)÷
1
2
+
2
3

(5)[1-(
1
4
+
1
4
)]÷
1
4
答案

①12×

6
5
÷
3
10

=12×

6
5
×
10
3

=48;

②(25+

3
4
)÷
1
4

=(25+

3
4
)×4

=25×4+

3
4
×4

=100+3

=103;

③12×

5
6
-
2
5
÷4

=12×

5
6
-
2
5
×
1
4

=10-

1
10

=9

9
10

④(

1
3
-
1
4
)÷
1
2
+
2
3

=(

1
3
-
1
4
)×2+
2
3

=

1
3
×2-
1
4
×2
+
2
3

=

2
3
-
1
2
+
2
3

=(

2
3
+
2
3
-
1
2

=

4
3
-
1
2

=

5
6

⑤[1-(

1
4
+
1
4
)]÷
1
4

=[1-(

1
4
+
1
4
)]×4

=1×4-(

1
4
+
1
4
)×4

=4-(

1
4
×4+
1
4
×
4)

=4-(1+1)

=4-2

=2.

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