Grade 3 addition worksheets
In third grade, children practice mental additions with twodigit numbers and certain easy type of additions with threedigitn umbers. They also add several 3 and 4digit numbers with regrouping using the standard addition algorithm (where one number is written under the other).
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All worksheets come with an answer key.
Jump to worksheets for:
Mental addition
 Complete one hundred (missing addend)
 Add two 2digit numbers  one addend is a whole ten

Add two 2digit numbers  one addend is a whole ten  missing addend
 Add a 1digit number to a 2digit number

Add a 1digit number and a 2digit number  missing addend
 Add a 2digit number and two 1digit numbers
 Add a 3digit number and a 1digit number
 Add two whole tens and two 1digit numbers

Add two whole tens and two 1digit numbers  missing addend
 Adding whole tens (3 addends)
 Adding whole tens (4 addends)

Adding whole tens (3 addends)  missing addend

Adding whole tens (4 addends)  missing addend
 Adding whole hundreds (2 addends)
 Adding whole hundreds (3 addends)

Add whole hundreds  missing addend
 Completing a whole thousand (whole hundreds are missing)
 Adding two numbers with thousands and whole hundreds
 Adding whole thousands to another number
Add in columns
 Adding two 2digit numbers
 Adding two 3digit numbers
 Adding three 3digit numbers
 Add three 3digit numbers in columns write the numbers one under the other yourself
 Adding four 3digit numbers
 Add four 3digit numbers in columns  write the numbers one under the other yourself
 Adding two 4digit numbers
 Adding three 4digit numbers
 Add three 4digit numbers in columns  write the numbers one under the other yourself
 Adding four 4digit numbers
See also
Grade 3 subtraction worksheets
Addition worksheets for grade 2
Grade 3 multiplication worksheets
2nd grade
3rd grade
4th grade
5th grade
6th grade
7th grade
Addition worksheets
Number bonds worksheets
Number Charts
Multiplication worksheets
Division worksheets
Basic operations: addition,
subtraction, multiplication
and division (incl. integers)
Roman numerals
Place value &
scientific notation
Rounding Time (clock)
Customary measuring units
Metric measuring units
Classify quadrilaterals
Area & perimeter of rectangles
Area of triangles & polygons
Coordinate grid, moves, reflections
Circle
US Money
Canadian Money
Australian Money
British Money
European Money
South African Money
Fraction worksheets 1
Fraction worksheets 2
Fraction addition
Comparing fractions
Equivalent fractions
Prime factorization / factors
GCF / LCM
Fraction Calculator
Decimal multiplication
Decimal division
Fraction/Decimal
Rounding decimals
Percent/Decimal
Percentage of a number
Various percentage problems
Exponents
Negative & zero exponents
Order of operations
Square Root
Proportions
Ratio word problems
Order of operations
Variable expressions
Evaluate expressions
Simplify expressions
Linear equations
Linear inequalities
Speed, time & distance
Graphing & slope
Equation calculator
Equation editor