TOPIC 1 · GRADE 3 FOUNDATION
Equal Parts and Unit Fractions
Understand what numerator and denominator mean by sharing wholes fairly.
MA.3.FR.1.1BIG IDEA
A fraction is one number. The denominator names how many equal parts make a whole; the numerator counts how many of those equal parts we have.
WHAT TO KNOW
- Equal parts must have equal size, even when their shapes look different.
- A unit fraction has numerator 1, such as 1/3 or 1/8.
- A larger denominator means smaller pieces when the wholes are the same size.
WATCH OUT
Three pieces do not automatically mean thirds; the three pieces must be equal in size.
TRY IT
Change the number of equal slices and shade different amounts.