问题 解答题
(1)直接写得数:
1
4
÷
3
5
=______;
2
9
×18
=______;
3
10
+
9
10
=______;
6-
5
8
=______;
5
2
×
3
7
=______;
3
7
×
3
7
=______;
(2)解方程:
27
4
=
20
63

4.5-
2
3
x=1
1
2
答案

(1)

5
12
,4,
6
5
5
3
8
15
14
9
49

(2)

27
4
=
20
63

x=

20
63
×
27
4

x=

15
7

4.5-

2
3
x=1
1
2

9
2
-
3
2
=
2
3
x,

2
3
x=3,

x=

9
2

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