Classify 129 as a prime or composite number.

Which of the following is NOT in the fact family of 4 | 24?

List all the factors of 54.

Fill in the blank to make a true statement. 15 is a _____ of 5.

Which of the following is NOT in the fact family of 4 | 28?

Prime factor 40.

The numbers -1 and 1 are called what?

Explain to a student how to use signed counters to evaluate this problem: -5 + (-2)

The signed counters shown below BEST represents this integer problem.

If 150 = 2x3x52 and 225 = 32×52, use the prime factor method to find the GCF of 150 and 225.