问题 解答题
脱式计算,能简算的要简算.
(1)(
1
2
+
1
3
)÷
2
5
-
2
3

(2)10.6-(6.6+
1
4
÷12.5%)
(3)(
4
5
+
1
4
)÷
7
3
+
7
10

(4)
15
16
×
5
6
+
5
6
×
1
16
答案

(1)(

1
2
+
1
3
)÷
2
5
-
2
3

=

5
6
×
5
2
-
2
3

=

25
12
-
8
12

=1

5
12

(2)10.6-(6.6+

1
4
÷12.5%),

=(10.6-6.6)-

1
4
×8,

=4-2,

=2;

(3)(

4
5
+
1
4
)÷
7
3
+
7
10

=

21
20
×
3
7
+
7
10

=

9
20
+
7
10

=1

3
20

(4)

15
16
×
5
6
+
5
6
×
1
16

=(

15
16
+
1
16
)×
5
6

=

5
6

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