The top number in a division problem (when expressed as a fraction) is called the numerator or dividend, and the bottom number is called the denominator or divisor.
Here's a breakdown to clarify:
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Fraction Representation: In the fraction a/b, 'a' is the numerator (top) and 'b' is the denominator (bottom).
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Division Problem: In the division problem a ÷ b, 'a' is the dividend (the number being divided) and 'b' is the divisor (the number doing the dividing).
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Equivalence: The fraction a/b is equivalent to the division problem a ÷ b. Therefore, the numerator is also the dividend, and the denominator is also the divisor. The result of the division (or the value of the fraction) is called the quotient.
Example:
Consider the division problem 10 ÷ 2 = 5.
- Dividend: 10 (also the numerator if written as a fraction: 10/2)
- Divisor: 2 (also the denominator if written as a fraction: 10/2)
- Quotient: 5
Therefore, depending on whether you're talking about a fraction or a division problem, the top is either the numerator or the dividend, and the bottom is either the denominator or the divisor.