Adding and Subtracting Fractions Flashcards

Grade 5 · Math · Flashcards

Review key concepts and practice problems for adding and subtracting fractions.

Flashcards

Numerator: The top number of a fraction that tells how many parts you have.
Denominator: The bottom number of a fraction that tells the total number of equal parts.
Least Common Denominator (LCD): The smallest number that is a multiple of both denominators; used to add or subtract fractions with unlike denominators.
Equivalent Fraction: A fraction that looks different but represents the same value, e.g., 1/2 = 2/4 = 3/6.
Simplest Form: A fraction where the numerator and denominator share no common factors other than 1.
Unlike Denominators: When two fractions have different bottom numbers, you must find the LCD before adding or subtracting.
1/2 + 1/3 = ?: 5/6 (LCD is 6; convert to 3/6 + 2/6 = 5/6)
3/4 - 1/4 = ?: 2/4 = 1/2 (same denominator; subtract numerators, then simplify)
2/5 + 1/2 = ?: 9/10 (LCD is 10; convert to 4/10 + 5/10 = 9/10)
5/6 - 1/3 = ?: 3/6 = 1/2 (LCD is 6; convert 1/3 to 2/6; 5/6 - 2/6 = 3/6 = 1/2)