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帯分数とは?.

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Presentation on theme: "帯分数とは?."— Presentation transcript:

1 帯分数とは?

2 1-3 1-3 ……「2と3分の1」 帯分数 たいぶんすう

3 いくつでしょう? 1-2 1-2 3-4 3-4 2-3 2-3

4 + + + 帯分数のたし算 1 1-4 2-4 2 1-4 3 = 1 1 1 1-5 2 2-5 = 3-5 3 2-7 2 4-7 =
分数は分数どうしをたす 1-4 整数は整数どうしをたす。  = 1-4 1-4 1-5 2-5 = 3-5 2-7 4-7 = 6-7

5 帯分数のひき算 4-5 1-5 = ①整数どうしをひく 4-5

6 帯分数のひき算 ②分数どうしをひく 4-5 1-5 = 4-5

7 帯分数のひき算 ②分数どうしをひく 4-5 1-5 = 3-5

8 4-7 1-7 = 3-7 7-8 4-8 = 3-8 5-9 2-9 = 4-9 3-9 7-9

9 帯分数を仮分数になおす

10 1-3 1-3 ……「2と3分の1」 帯分数 たいぶんすう

11 1-3 仮分数 かぶんすう 1-3  -3 3×2=6 6+1=7

12 3-4 11 3-4  -4 4×2=8 8+3=11

13 帯分数を仮分数になおす 13 2 3-5 = -5 7 3 1-2 = -2 26 11 3 5-7 = -7 1 3-8 = -8 35
 -5 1-2  -2 26 11 5-7  -7 3-8  -8 35 37 5-6  -6 1-9  -7

14 仮分数を帯分数になおす

15 4-4 =1  11-4  -4 計算のしかた 11

16  11-3  -3 11

17  9-4  -4  37-5  -5  25-8  -8  9 37 25 35 24

18  12-4 12 12  16-8  18-6  45-9


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