试题:
灵活计算.
6
7
-
2
5
)÷
1
35
7
8
×0.375+
3
8
÷
8
9

答案:

我来补答
(1)(
6
7
-
2
5
)÷
1
35

=(
6
7
-
2
5
)×35,
=
6
7
×35-
2
5
×35,
=30-14,
=16;

(2)
7
8
×0.375+
3
8
÷
8
9

=
7
8
×
3
8
+
3
8
×
9
8

=(
7
8
+
9
8
)×
3
8

=2×
3
8

=
3
4
 
 
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