试题:
75×
3
5
+24×
3
5
+
3
5
13
2
-
19
8
÷
11
4
1
3
÷
3
4
÷4
9
13
÷8+
1
8
×
7
13

答案:

我来补答
(1)75×
3
5
+24×
3
5
+
3
5

=(75+24+1)×
3
5

=100×
3
5

=60;

(2)(
13
2
-
19
8
÷
11
4

=
33
8
÷
11
4

=1.5;

(3)3÷
1
3
÷
3
4
÷
4,
=3÷(
1
3
×
3
4
×
4),
=3÷1,
=3;

(4)
9
13
÷8+
1
8
×
7
13

=(
9
13
+
7
13
)×
1
8

=
16
13
×
1
8

=
2
13
 
 
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