题目内容

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.
(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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