3rd grade addition & subtraction worksheets

A real sample sheet.

Six addition & subtraction skills at 3rd grade, one sheet each, free with its answer key: addition with regrouping, fact families, mental math, and more.

Most sheets change with every click. Any other skill prints from its row below. Examples and teaching notes

Facts & fluency

  • Fact families The three numbers in the roof are a family. Write all four facts they make together.

Multi-digit addition & subtraction

  • Addition with regrouping Add the ones first. When they make ten or more, write the ones digit and carry the ten to the next column.
  • Mental math Turn hard numbers into friendly ones: to add 29, add 30 and then take 1 back.
  • Subtracting across zeros When a zero can't lend, keep moving left until you find a digit that can.
  • Subtraction with regrouping If the top digit is smaller, borrow: take one ten from the next column and add ten to the digit you are subtracting from.
  • Three-digit addition & subtraction Check the sign first, then work one column at a time starting from the ones.

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More 3rd grade math: Counting & place value · Multiplication & division · Word problems · Fractions · Area & volume · Measurement · Data & graphing

Addition & subtraction at other grades: K · 1st · 2nd · 4th · 7th

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