问题 解答题
用递等式计算,能简算的要简算.
1÷﹙18.5-4.5×3﹚
6
7
÷
3
14
-
6
5
×
2
3

2
5
×
3
8
×40.
答案

(1)1÷﹙18.5-4.5×3﹚,

=1÷﹙18.5-13.5﹚,

=1÷5,

=0.1;

(2)

6
7
÷
3
14
-
6
5
×
2
3

=4-

4
5

=3

1
5

(3)

2
5
×
3
8
×40,

=

6
40
×40,

=6.

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