
Key Concepts in Grade 3 Math
Place value
Place value to the hundredthousand place
Rounding whole numbers to the nearest ten or hundred
Estimating using rounding or compatible numbers
Modeling with place value blocks for adding and subtracting
Standard and expanded word form
Comparison and ordering of larger numbers
Math fact mastery  addition, subtraction, multiplication and division
Addition and subtraction of whole numbers
Using mental math to add and subtract
Adding and subtracting with regrouping
Subtracting across zeros
Multiplication and Division
Understand that multiplication is repeated addition
Use arrays as visual models of multiplication
Commutative and distributive properties of multiplication
Multiply 3 factors
Multiples of 10
Understand that division is sharing and repeated subtraction
Relationship between multiplication and division
Fractions
Fractions as equal parts
Fractions as parts of a set
Fractions on a number line
Comparing fractions with like denominators
Equivalent fractions
Mixed numbers
Geometry
Lines, segments, angles
Polygons, including triangles and quadrilaterals, and their characteristics (number of sides, angles, parallel sides, right angles, etc.)
Perimeter and area
Customary and metric units of capacity, weight, length
Time
Time to half hour, quarter hour, minute
Units of time: days in a week, hours, etc.
Elapsed time and working backwards to determine elapsed time
Problem solving
Solve word problems using all key concepts
Use bar diagrams to solve problems and include examples
Determine if an answer is reasonable or not
 Multiplestep problems