问题 解答题
能简算的要简算
3
4
+
5
16
)÷
1
36

5
7
÷
1
8
+
2
7
×8
42000÷125÷8
15
8
×[
4
5
-(
1
5
+
1
3
)].
答案

(1)(

3
4
+
5
16
)÷
1
36

=

17
16
×36,

=

153
4

(2)

5
7
÷
1
8
+
2
7
×8

=

5
7
×8+
2
7
×8,

=(

5
7
+
2
7
)×8,

=1×8,

=8;

(3)42000÷125÷8

=42000÷(125×8),

=42000÷1000,

=42;

(4)

15
8
×[
4
5
-(
1
5
+
1
3
)]

=

15
8
×[
4
5
-
8
15
],

=

15
8
×
4
15

=

1
2

计算题
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