题目内容

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
)].
(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
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