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Mary Machatsch

Prime Numbers Video

Grades: 4th Grade, 5th Grade, 3rd Grade
Subjects: Math

Student Instructions

Watch the video where it is up to Open up the hundreds chart and cross off all numbers that are not prime! Remember : 1 is not a prime number! keep 2 and cross off its multiples Keep 3 and cross off its multiples Keep 5 and 7 and cross off its multiples! All numbers left over are the prime numbers!