1. 把小数化成简分数。
$0.45 = \dfrac{□}{□}$ $0.75 = \dfrac{□}{□}$ $4.25 = □\dfrac{□}{□}$
$0.25 = \dfrac{□}{□}$ $0.375 = \dfrac{□}{□}$ $1.875 = □\dfrac{□}{□}$
$0.65 = \dfrac{□}{□}$ $0.55 = \dfrac{□}{□}$ $8.125 = □\dfrac{□}{□}$

$0.45 = \dfrac{□}{□}$ $0.75 = \dfrac{□}{□}$ $4.25 = □\dfrac{□}{□}$
$0.25 = \dfrac{□}{□}$ $0.375 = \dfrac{□}{□}$ $1.875 = □\dfrac{□}{□}$
$0.65 = \dfrac{□}{□}$ $0.55 = \dfrac{□}{□}$ $8.125 = □\dfrac{□}{□}$
答案
9
20
3
4
4
1
4
1
4
3
8
1
8
7
13
20
11
20
8
1
8
20
3
4
4
1
4
1
4
3
8
1
8
7
13
20
11
20
8
1
8
2. 把分数化成小数。
$\dfrac{7}{40} =$ $\dfrac{5}{8} =$ $\dfrac{5}{16} =$
$\dfrac{13}{25} =$ $\dfrac{17}{50} =$ $\dfrac{17}{20} =$
$\dfrac{7}{40} =$ $\dfrac{5}{8} =$ $\dfrac{5}{16} =$
$\dfrac{13}{25} =$ $\dfrac{17}{50} =$ $\dfrac{17}{20} =$
答案
0.175
0.625
0.3125
0.52
0.34
0.85
0.625
0.3125
0.52
0.34
0.85
3. 把分数化成小数。
$\dfrac{1}{5} =$ $\dfrac{1}{2} =$ $\dfrac{1}{8} =$ $\dfrac{1}{4} =$
$\dfrac{3}{4} =$ $\dfrac{2}{5} =$ $\dfrac{3}{5} =$ $\dfrac{4}{5} =$
$\dfrac{3}{20} =$ $\dfrac{13}{20} =$ $\dfrac{7}{8} =$ $\dfrac{1}{20} =$
$\dfrac{1}{16} =$ $\dfrac{1}{25} =$ $\dfrac{1}{10} =$ $\dfrac{7}{20} =$
$\dfrac{1}{5} =$ $\dfrac{1}{2} =$ $\dfrac{1}{8} =$ $\dfrac{1}{4} =$
$\dfrac{3}{4} =$ $\dfrac{2}{5} =$ $\dfrac{3}{5} =$ $\dfrac{4}{5} =$
$\dfrac{3}{20} =$ $\dfrac{13}{20} =$ $\dfrac{7}{8} =$ $\dfrac{1}{20} =$
$\dfrac{1}{16} =$ $\dfrac{1}{25} =$ $\dfrac{1}{10} =$ $\dfrac{7}{20} =$
答案
0.2
0.5
0.125
0.25
0.75
0.4
0.6
0.8
0.15
0.65
0.875
0.05
0.0625
0.04
0.1
0.35
0.5
0.125
0.25
0.75
0.4
0.6
0.8
0.15
0.65
0.875
0.05
0.0625
0.04
0.1
0.35
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