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Activity
National Institute of Educational Technologies and Teacher Training (Spain)

Ministerio De Educacion: La Criba De Eratostenes

For Teachers 3rd - 5th Standards
Reinforce your knowledge about prime and composite numbers. Geogebra plugin required.
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Activity
National Institute of Educational Technologies and Teacher Training (Spain)

Ministerio De Educacion: Primos Gemelos

For Students 3rd - 5th Standards
A twin prime is a prime number that differs from another prime number by two. Learn about them with these exercises.
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Activity
National Institute of Educational Technologies and Teacher Training (Spain)

Ministerio De Educacion: Divisores Y Primos

For Students 3rd - 8th Standards
Reinforce your knowledge on prime numbers and their divisors.
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Unit Plan
Homeschool Math

Homeschool Math: Prime Factorization of Three Digit Numbers

For Teachers 5th
This lesson shows examples of how to get started with the prime factorization of three-digit or larger numbers, using a factor tree. includes numerous practice exercises.

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