# Adding Numbers : Addition and Subtraction : Third Grade Math Worksheets

Here is a collection of our printable worksheets for topic Adding Numbers of chapter Addition in section Addition and Subtraction.

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Please visit Addition or Addition and Subtraction to view our large collection of printable worksheets. View the full list of topics for this grade and subject categorized by common core standards or in a traditional way.

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Estimate Sums

Estimating sums by using rounding and compatible numbers.

Practice adding 4- digit numbers to find the sums.

Nighty Night

Solve each addition problem using regrouping / carry over.

Practing addition in a horizontal format.

Adding More Than 2 Numbers (0-100)

Sharpen your addition skills by adding three numbers in a horizontal format.

Adding More Than 2 Numbers (0-100)

This horizontal addition worksheet allows students to practice adding three numbers.

Adding More Than 2 Numbers (0-100)

Practice adding three numbers (up to 100).

Adding More Than 2 Numbers (0-20)

Practice adding more than two numbers in a horizontal format.

Adding More Than 2 Numbers (0-20)

Practice adding more than 2 numbers in a horizontal format.

Solve addition problems with 3-digit numbers.

3 - Digit Addition

Practice 3 - digit addition.

Shelly Squirrel's 3 - Digit Addition

Shelly Squirrel eats the acorns that have the number 1 in the ones place. Add to find each sum and cross each answer with 1 in the ones place.

Add 2 - Digit Numbers

Estimate, then find the sum using place value or mental math.