Phần hướng dẫn bên dưới chưa có bằng tiếng Việt nên được hiển thị bằng tiếng Anh. Bản thân máy tính đã được dịch đầy đủ.
Cách sử dụng máy tính này
- 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.
Công thức
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.
Câu hỏi thường gặp
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.