13分数的基本性质.ppt

文档介绍：义务教育六年制小学数学第十册
考考你:
1
6 ×( )
6
=
1×( )
=
4
24
4
4 ×( )
7
=
7 ×( )
=
35
( )
12 ÷ ( )
=
=
12
4
4÷ ( )
1
3
16÷ ( )
=
=
16
24
24÷ ( )
( )
2
4
4
5
5
20
4
4
8
8
3
3
4 ×0
4
=
3×0
=
?
把和分别化成分母是6,而大小不变的分数。
1
3
16
24
把和分别化成分子是1的数。
5
30
4
28
你会填吗?
1÷ 6 =
( )
( )
( )
=
( )
( )
□
( )
( )
□
=
3
12÷ 30 =
( )
=
( )
( )
=
( )
( )
□
( )
( )
□
2
1 × 3
6
1
6 × 3
18
30
12
12 ÷ 6
30 ÷ 6
5
数学小考场
你会说吗?
( )
( )
8
□
( )
12
□
=
3
( )
3
3 ×
=
( )
2
□
3
=
2
( )
( )
5
15
=
( )
15
□
=
( )
5 ÷ 5
在下面的括号里填上适当的数
2
9
( )
3
=
8
6
( )
12
=
3
20
( )
5
=
( )
35
8
7
=
6
4
12
40
这样做对吗?
4
8
8÷2
=
2
×
=
4
8
4
3
6
6×
=

×
=
2
1
2
9
5
5﹢4
=
4
﹢
=
3
7
3
9
18
18÷2
=
9
÷
=
9
1
9