Lesson Plan - Get It!
The pizza you are eating for dinner has 8 slices. You ate 2⁄8 of the pizza. Your brother ate 5⁄8 of the pizza. How much of the pizza did you and your brother eat? How much more pizza did your brother eat than you?
Fractions are numbers less than 1 that show part of a whole.
The top number of a fraction is the numerator. The bottom number of a fraction is the denominator. Fractions with the same denominator have common denominators.
Watch a short video to review adding and subtracting fractions with the same denominator and write down the answers to these questions:
- When adding or subtracting fractions with the same denominator, which numbers do we add?
- When adding or subtracting fractions with the same denominator, which numbers stay the same?
- Does subtracting fractions work the same way as adding fractions?
Discuss the questions above after you have watched Math Antics - Adding and Subtracting Fractions:
When fractions have a common denominator, add the numerators and keep the denominator the same:
When fractions have a common denominator, subtract the numerators and keep the denominator the same. Be sure to subtract the smaller number from the larger number:
Now, you will move on to the Got It? section to complete interactive practice with adding and subtracting fractions.