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Venn Diagram to Classify Numbers I really needed this on my last Math test...

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from Teachers Pay Teachers

### Number Theory No Prep Worksheets Divisibility Rules GCF LCM Prime Factorization

This math unit on number theory has it all: Definitions Divisibility Rules Prime or Composite Factors Prime Factorization Greatest Common Factor (2 methods!) Least Common Multiple Practice and Enrichment Sheets

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MathFoundations173: A disruptive view of big number arithmetic - YouTube

MathFoundations184: Reconsidering natural numbers and arithmetical expressions - YouTube

from teachingwithamountainview.com

### Dividing Fractions Anchor Chart, Game Freebie, and Math Journal

#Maths for kids - #Dividing #Fractions Anchor Chart

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from Teachers Pay Teachers

### "Factor Stacking" Activity - Unique, Visual Approach to Number Theory Basics

Factor Stacking! Number Theory Activity - Very Visual so students can *SEE* what Prime and Composite mean

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6-8 year olds 1.3 order and compare rational numbers 1.5 number theory concepts (e.g., primes, composites, factors, divisibility ,and multiples) in mathematical problem situations

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from io9

### Fetching minimalist prints honor mathematicians and their contributions

Minimal Posters - Five Great Mathematicians And Their Contributions.

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Multiplication Properties poster for fifth grade math. Commutative, Associative (my favorite), Distributive, Identity, and Zero Properties.

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OMG! 73.73 is the best number!!! Oh these guys...got to love them!

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