Fractions with Common Denominators

Fractions with Common Denominators

4th Grade · Math · 30 min

Lesson Preview

Learning Objective

I can identify and compare fractions with common denominators.

  • 1

    To add or subtract fractions with different bottom numbers, you must first change them into fractions with a common denominator.

  • 2

    One way to find a common denominator is to multiply the two different bottom numbers; then, multiply each fraction by a 'whole fraction' made from the opposite denominator.

  • 3

    After changing to 'like' fractions, add or subtract the top numbers and keep the bottom number the same.