分数的分子和分母分别是什么？

分子是分数上面的数字，表示部分；分母是分数下面的数字，表示整体的分成部分。

如何比较两个分数的大小？

可以通过找到它们的公分母，或者将它们转换为小数进行比较。

什么是最简分数？

最简分数是指分子和分母没有共同因子的分数，无法再简化。

如何将小数转换为分数？

将小数写成分数形式，分母为10的幂，例如0.75 = $$\frac{75}{100}$$ ，然后简化。

分数加法的基本原则是什么？

分数加法需要找到公分母，然后将分子相加，最后简化结果。

分数和小数健脑操（STD 4，5） Flashcards

Student preview

15 questions

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1.

FLASHCARD QUESTION

Front

什么是分数？

Back

分数是表示部分与整体之间关系的数学表达式，通常写作 $\frac{a}{b}$ ，其中 $a$ 是分子， $b$ 是分母。

2.

FLASHCARD QUESTION

Front

什么是小数？

Back

小数是表示部分的数，通常用点（.）分隔整数部分和小数部分，例如0.25。

3.

FLASHCARD QUESTION

Front

$\frac{1}{4}$ 转换为小数是多少？

Back

0.25

4.

FLASHCARD QUESTION

Front

$\frac{5}{8}$ 转换为小数是多少？

Back

0.625

5.

FLASHCARD QUESTION

Front

0.625 等于哪个分数？

Back

$\frac{5}{8}$

6.

FLASHCARD QUESTION

Front

$\frac{7}{8}$ 转换为小数是多少？

Back

0.875

7.

FLASHCARD QUESTION

Front

如何将分数转换为小数？

Back

将分子除以分母，例如 $\frac{1}{4}$ = 1 ÷ 4 = 0.25。

8.

FLASHCARD QUESTION

Front

0.2 等于哪个分数？

Back

$\frac{1}{5}$

9.

FLASHCARD QUESTION

Front

0.5 等于哪个分数？

Back

$\frac{1}{2}$

10.

FLASHCARD QUESTION

Front

0.875 等于哪个分数？

Back

$\frac{7}{8}$

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