Rational Numbers Essential Question: What do we need to do before we can add or subtract fractions? Unit 2 Day 4
Rational Numbers Vocabulary: Numerator: Denominator: Least common multiple (LCM): Common denominator: Least common denominator (LCD) Reciprocal Number on top: part of the whole Number on bottom: the whole (Divisor) Is the smallest positive number that is dividable by both numbers Same denominator LCM of the denominators of a set of fractions multiplicative inverse: flip the fraction
Fractions must have a common denominator in order to add or subtract them.
Add or Subtract Fractions with common denominators: = 6 = -2
Practice:
Summary: In one sentence: write down what do we need to do before we can add or subtract fractions?