问题 解答题
怎样算简便就怎样算.
4
9
×
1
5
÷
4
5
1
8
×58+42÷836×(
2
3
+
1
6
-
3
4
答案

(1)

4
9
×
1
5
÷
4
5

=

4
45
÷
4
5

=

1
9

(2)

1
8
×58+42÷8,

=

1
8
×58+42×
1
8

=(58+42)×

1
8

=100×

1
8

=12.5;

(3)36×(

2
3
+
1
6
-
3
4
),

=36×

2
3
+36×
1
6
-36×
3
4

=24+6-27,

=30-27,

=3.

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