Find here many important 3rd grade math concepts taught in 3rd grade. Teachers, parents, and math tutors can also use them as a guideline to illustrate a math lesson or to teach important skills that kids are supposed to know in 3rd grade math.
Segment A segment is a portion of a line and it has 2 endpoints. 
Identity property of addition 
5 + 0 = 5 
Identity property of addition 
5 + 0 = 5 
Parallel lines 
1 inch 1 foot = 12 inches 
Division 
Gram/ kilogram 
Expanded form 

Divisor 
Factors A factor is a number that is multiplied by one or more numbers. 
Area 
Word form of numbers 
24652 is read twenty four thousand, six hundred fiftytwo 
Addition algorithm 
Commutative property of multiplication 
Identity property of multiplication 
5 × 1 = 5 
Identity property of multiplication 
5 × 1 = 5 
Commutative property of addition. 
Perimeter 
Fact family 
Pattern: What is the next shape? 

Pattern: What is the next shape? 
☺ ♥ ♥ ♦ ☺♥ 
Pentagon 

Point 
• 
Standard form 

Unit fraction A fraction whose numerator is equal to 1. The denominator can be equal to any number. 
Round a number 28 is closer to 30, so the nearest 10 is 30. 
Product 
Fraction 
Quotient 
Evaluate 
Evaluate 2n + 5 when n = 3 
Evaluate 
Evaluate 2n + 5 when n = 3 


Three fourths 

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Learn how to derive the equation of an ellipse when the center of the ellipse is at the origin.
Basic math formulas
Algebra word problems
New math lessons
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