Fraction Calculator|分数运算计算器

分数运算计算器 | Fraction Calculator

分数运算计算器 Fraction Calculator

输入两个分数,选择加减乘除,工具将自动完成运算、约分,并给出假分数、带分数和小数结果。
Enter two fractions and choose an operation. The calculator will perform the operation, simplify the result, and show it as an improper fraction, a mixed number, and a decimal.

1. 输入分数与运算 · Fractions & Operation
整数部分 · Integer part
分子 · Numerator
分母 · Denominator
可输入:
• 纯整数:只填“整数部分”,分子与分母留空(视为 /1)。
• 真分数:整数为 0,填写“分子/分母”,如 0, 1, 2 → 1/2。
• 带分数:如 1 1/2 代表 1.5;负号建议写在整数部分(如 -1 1/2)。
You may enter:
• Whole number only (integer box, others empty, e.g. 3 → 3/1).
• Proper fraction (0, numerator, denominator).
• Mixed number (integer + numerator/denominator), e.g. 1 1/2.
整数部分 · Integer part
分子 · Numerator
分母 · Denominator
若只想对单个分数进行“约分/带分数转换”,可将另一边设置为 0:
• 选择“+”或“-”,把 B 设为 0,相当于只查看 A 的简化形式;
• 或把 A 设为 0,只输入 B 的值。
For simplification/conversion of a single fraction, set the other fraction to zero (e.g. A + 0 or 0 + B).
• 加减法:自动通分后计算,再约分。
• 乘法:分子相乘、分母相乘,再约分。
• 除法:A ÷ B = A × (B 的倒数),若 B 为 0,则无法计算。
• For division, B must not be 0 (otherwise the operation is undefined).
3. 分数与带分数小结 · Working with Fractions & Mixed Numbers
  • 假分数(如 7/4) · Improper Fraction (e.g. 7/4):
    分子大于或等于分母的分数形式。适合用于代数推导、运算编程等场景。
    An improper fraction has a numerator greater than or equal to its denominator. This form is convenient for algebraic manipulation and programming.
  • 带分数(如 1 3/4) · Mixed Number (e.g. 1 3/4):
    把假分数拆成“整数 + 真分数”,更贴近日常表达和直观理解。
    A mixed number splits an improper fraction into a whole number plus a proper fraction, which is easier to interpret in everyday contexts.
  • 互相转换 · Conversion:
    • 假分数 → 带分数:7/4 = 1 3/4,整数部分为 7 ÷ 4 = 1,余数 3。
    • 带分数 → 假分数:1 3/4 = (1×4+3)/4 = 7/4
    • Improper → Mixed: divide numerator by denominator to get the whole part and remainder.
    • Mixed → Improper: whole × denominator + numerator, over the same denominator.
  • 约分 · Simplification:
    分子与分母同时除以它们的最大公约数(GCD),得到最简分数形式。
    To simplify a fraction, divide both numerator and denominator by their greatest common divisor (GCD).
  • 小数近似 · Decimal Approximation:
    有些分数(如 1/3)的小数形式是无限循环的,工具会给出有限位数的近似值(如 0.3333), 若在考试或金融场景中,请结合题目要求处理进位与四舍五入。
    Some fractions (like 1/3) have repeating decimals. The calculator shows a rounded approximation with limited decimal places. For exams or financial work, follow the rounding rules required.

说明:本工具基于标准分数运算规则进行计算,结果仅供学习、教学与日常计算参考, 不构成任何财务或考试答案的唯一标准。请根据具体场景进行适当的进位和保留位数设置。
Note: This tool follows standard fraction arithmetic rules. The results are for learning, teaching, and everyday calculations only, and do not constitute official answers for exams or financial reports. Please adjust rounding and decimal precision as required in your specific context.