问题 解答题
直接写得数.
3
8
×12
=
5
7
÷
10
21
=
0.9-
1
10
=
12×
3
4
×
2
9
=
4
7
÷2÷
1
7
=
(
2
3
-
1
4
)×12
=
答案

(1)

3
8
×12=4
1
2

(2)

5
7
÷
10
21
=
3
2

(3)0.9-

1
10
=0.8;

(4)12×

3
4
×
2
9
=2;

(5)

4
7
÷2÷
1
7
=2;

(6)(

2
3
-
1
4
)×12=5.

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