帮您快速完成分数的加减乘除、约分与带分数转换,支持混合数输入。
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Enter integers for numerator and denominator (numerator can be negative). Select an operation to calculate and simplify automatically. (Tip: Numerator is the top number, denominator is the bottom number.)

Prime and Composite Number Calculator
Instantly identify prime, composite, or special numbers. Supports batch checking and mathematical property analysis.

Trigonometry Calculator
Calculate six trigonometric functions from radian values with custom decimal precision.
Continued Fraction Calculator
Free online continued fraction calculator. Expand any real number or fraction into a continued fraction, or convert a sequence back into a rational number. Instantly calculate convergents and best rational approximations.
约分计算器
输入分子分母,一键得到最简分数及详细约分过程。

Prime and Composite Number Calculator
Instantly identify prime, composite, or special numbers. Supports batch checking and mathematical property analysis.

Trigonometry Calculator
Calculate six trigonometric functions from radian values with custom decimal precision.
Continued Fraction Calculator
Free online continued fraction calculator. Expand any real number or fraction into a continued fraction, or convert a sequence back into a rational number. Instantly calculate convergents and best rational approximations.
约分计算器
输入分子分母,一键得到最简分数及详细约分过程。

Inverse Trigonometric Function Calculator
Accurately calculate radian values for inverse trig functions like arcsin and arccos. Supports 6 function types and custom decimal precision.
做菜时要把3/4杯面粉改成1/2份,或者数学作业里要算2/5 + 3/8,又或者装修时瓷砖胶的调配比例是7:3却需要按总量调整——打开我们的分数计算器,填数字就能出结果。
5/12 + 7/18 是否等于 29/36。2/3 × 1/2 立刻得到 1/3 杯。主算例:计算 3/4 + 5/6。
3/4,在「运算」选择 +,在「第二个分数」输入 5/6。19/12(假分数),也可切换成带分数 1 7/12。同时会显示约分后的最简分数。对照例(分数乘法与约分):4/9 × 3/8。
4/9 和 3/8,选 ×。12/72。1/6。| 显示形式 | 含义 | 例子 |
|---|---|---|
| 真分数 | 分子小于分母,小于1 | 3/5 |
| 假分数 | 分子大于等于分母,大于等于1 | 7/4 |
| 带分数 | 整数部分+真分数,便于实际理解 | 1 3/4 |
| 约分后最简分数 | 分子分母互质,标准结果 | 2/3(而非4/6) |
我们的计算器默认返回最简分数,并同时提供假分数和带分数两种形式供你选择。
a/b 形式,整数直接写数字(如 2 表示 2/1)。1 1/2(空格分隔),应输入 3/2 或先转换。我们的工具支持「带分数输入」模式(如果提供),请按界面提示操作。现在你可以在上方计算器里试试自己的数字——比如算一下你明天的午餐食谱需要多少面粉。