资料简介
西岔小学
薛宏挺
把 化成分母是12
而大小不变的分数
3
2
24
10
8
×3 4
2
3 = 12
10÷ 2
24 ÷ 2 =10
24 = 12
5
=2×4
1
3 6
( )
=
1
4
5
( )=( )10
15 3=
把 和 化成分母是10
而大小不变的分数
5
3
20
16
2
816
20 10=
2 20
63
5 10=
( )( )
4
3 = 3
9
÷
÷
÷× ×=
= =
3 4 3 4 3
12 12
9
÷24= =24
8÷( )8
( )
1
( )
100×25
7 ×( )7
25 ( )= = ( )
÷ 15 3
12÷() 12
15 =4 ( )×
3× 33
4 =
8 3
28
3
3
4
4
8
×9
2× 42
9 4= = 8
36
×5
4÷ 24
5 2= = 2
10
= 39 ÷
4÷ 24
9 = 2
3
4 a×
3× a3
4 =
9
18 = 1
9
5
10 = 3
6
10
16
5
( )=
1
3 9
( )
=
=8
16
( )
( )
9
21 7
( )=
3
3
2
1
8
12
( )2
3 = = 25
( )1
9
( )2
3 = = 10
( )15
6
20
15
=( )
( )
8
16
=( )
( )32
=( )
( ) =( )
( )
=( )
( ) =( )
( )
=( )
( )=( )
( ) =( )
( )
16
64
32
20
10
4
8
7
14
6
12
30
15 14
28
9
18
3
a b
1 =
a = 1
2
3
4
5
…..
=b 3
6
9
12
15
…..
(a b 都是自然数)
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化成分母相同而大小不同的分数
3
2
5
4
15
11
把
3
2
5
4
15
11
15
10
15
12
15
11
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