以下のガイドはまだ日本語に翻訳されていないため、英語で表示しています。計算機自体はすべて日本語に対応しています。
この計算機の使い方
- Enter the first fraction. For a mixed number such as 2 ¾, enter 2 as the whole number, 3 as the numerator and 4 as the denominator. Leave the whole number at 0 for a simple fraction.
- Choose the operation.
- Enter the second fraction. For a negative mixed number, enter a negative whole number.
計算式
Fractions are combined over a common denominator, then simplified by dividing the numerator and denominator by their greatest common divisor. Exact integer arithmetic avoids rounding errors.
a/b + c/d = (ad + bc) / bd
a/b × c/d = ac / bd
a/b ÷ c/d = ad / bc
Example
- 1/2 + 1/3 = (1×3 + 1×2) / (2×3) = 5/6.
- 2 ¾ × 1/2 = 11/4 × 1/2 = 11/8 = 1 3/8 = 1.375.
よくある質問
How do I simplify a fraction?
Divide the numerator and denominator by their greatest common factor. For example, 18/24: GCF = 6, so 18/24 = 3/4. You can enter a fraction and add 0 to simplify it.
How do I convert a mixed number to an improper fraction?
Multiply the whole number by the denominator and add the numerator: 2 ¾ = (2 × 4 + 3)/4 = 11/4.
Can I divide by zero?
No. A denominator of zero or dividing by a fraction equal to zero is undefined, and the calculator will show an error.