Document 9660427

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Transcript Document 9660427

8
16
4
8
2
4
1
2
8
16
1
2
4
8
2
4
2
4
4
8
1
2
8
16
扩分
1 1 2 2 2  2 4 4  2 8
= =
= =
=
=
2 2  2 4 4  2 8 8  2 16
约分
8 82 4 42 2 22 1
=
= =
=
= =
16 16  2 8 8  2 4 4  2 2
红色部分是全图的几分之几?
6
12
3
6
1
2
6
12
6
12
=
=
66
12  6
1
2
=
1
2
蓝色部分是全图的几分之几?
15
45
3
9
1
3
15
45
15
45
=
=
1
3
15  15
45  15
=
1
3
8
10
=
82
10  2
=
4
5
6
24
=
66
24  6
=
1
4
16
2

24
?
?3
30
?

54
9
?5
26 ?

52 ?
1
2