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Common Core Videos for Grades 1 to 3

Numbers and Properties

Whole Number Operations

Decimals

What is a prime number?

What is prime factorization?

What are divisibility rules?

How do you round numbers?

How do you find GCF and LCM?

Word Problem - GCF

What is prime factorization?

What are divisibility rules?

How do you round numbers?

How do you find GCF and LCM?

Word Problem - GCF

Fractions

Ratio and Proportion

Measurement and Data

Percent

Prealgebra

Algebraic Equations

How do you find the sale price?

Convert fractions to percents

Calculating the tip

Percents

Percent Change

Convert fractions to percents

Calculating the tip

Percents

Percent Change

Geometry - Area

Geometry - Surface Area

Geometry - Angles

Geometry - Other Topics

Thinking Blocks - Addition

Thinking Blocks - Multiplication

Thinking Blocks - Fractions

Thinking Blocks - Ratio and Proportion

Thinking Blocks - Percent

Thinking Blocks - Algebra