问题 解答题
灵活计算,(能简便计算的要用简便方法计算).
2-
8
15
÷
4
9

36×(
1
6
+
2
3

4
5
+
2
3
÷6)×
5
7

22.1-4.88-4.12.
答案

(1)2-

8
15
÷
4
9

=2-

6
5

=

4
5

(2)36×(

1
6
+
2
3
),

=36×

1
6
+
2
3
×36,

=6+24,

=30;

(3)(

4
5
+
2
3
÷6)×
5
7

=(

4
5
+
1
9
)×
5
7

=

4
5
×
5
7
+
1
9
×
5
7

=

4
7
+
5
63

=

41
63

(4)22.1-4.88-4.12,

=22.1-(4.88+4.12),

=22.1-9,

=13.1.

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