Rainbow Factors #3

List factor pairs with this bright fourth-grade math worksheet! In each rainbow, students are given a number within 100. Learners must write out the factor pairs of each number, then decide whether the number is prime or composite. If a number’s only factors are one and itself, that number is prime!

This colorful activity can help build number sense and reinforce the concepts of prime and composite numbers. Finding factor pairs can allow students to practice multiplication fact fluency and can prepare them to learn about common factors and common multiples.

This worksheet is the last in the series; be sure to complete Rainbow Factors #1 and Rainbow Factors #2. For more practice, try Prime, Composite, and Factoring Fun.