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hundred number grid 0-99 chart
Hundred Number Grid (0-99)

Sieve of Eratosthenes

Grade 6

Created by:

Math & Movement

Estimated Activity Time:

Standard:

Concept(s):

Activity Instructions

A prime number is a natural number that is greater than one and only has two factors, one and itself. Use the Sieve of Eratosthenes to find all the prime numbers up to 99.
1. Stand on the number one. One is special—it is neither prime nor composite.
2. Step to the number two. This number is prime. Skip count by twos, covering all
the multiples of two with black construction paper.
3. Move to the next number that is not covered with construction paper (in this case
it will be three). Skip count by threes and cover all the multiples of three with black
construction paper.
4. Continue the same pattern until one hundred. The numbers not covered in black
construction paper are the prime numbers.

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