题目内容

能简算的要简算.
4
5
-
2
3
)×15

40%×
1
3
+
2
3
÷
5
2
39×
1
2
×
7
13
0.125×
4
11
+
1
8
÷
11
2
+12.5%×
5
11
(1)(
4
5
-
2
3
)×15,
=
4
5
×15-
2
3
×15,
=12-10,
=2;

(2)40%×
1
3
+
2
3
÷
5
2

=
2
5
×
1
3
+
2
3
×
2
5

=
2
5
×(
1
3
+
2
3
),
=
2
5
×1,
=
2
5


(3)39×
1
2
×
7
13

=(39×
7
13
)×
1
2

=21×
1
2

=
21
2


(4)0.125×
4
11
+
1
8
÷
11
2
+12.5%×
5
11

=0.125×
4
11
+0.125×
2
11
+0.125×
5
11

=0.125×(
4
11
+
2
11
+
5
11
),
=0.125×1,
=0.125.
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