问题 解答题
脱式计算.
3
10
+
1
4
)÷
2
5
4
7
÷6+
3
7
×
1
6
5
6
+
3
8
)÷(
5
6
-
3
8
2
3
÷[(
4
5
-
1
4
)×15].
答案

(1)(

3
10
+
1
4
)÷
2
5

=

11
20
×
5
2

=

11
8

(2)

4
7
÷6+
3
7
×
1
6

=

4
7
×
1
6
+
3
7
×
1
6

=(

4
7
+
3
7
)×
1
6

=

1
6

(3)(

5
6
+
3
8
)÷(
5
6
-
3
8
),

=

29
24
÷
11
24

=

29
24
×
24
11

=

29
11

(4)

2
3
÷[(
4
5
-
1
4
)×15],

=

2
3
÷[
11
20
×15],

=

2
3
÷
33
4

=

2
3
×
4
33

=

8
99

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