Free Printable Mixed Addition and Subtraction Worksheets for Grade 3

Encourage students to use estimation to check their answers. Before solving a problem like 512 – 298, ask them to round to the nearest hundred (500 – 300) to predict a reasonable answer (around 200). This practice helps them catch calculation errors and builds number sense.

These worksheets focus on building fluency with addition and subtraction within 1,000. They include a mix of three-digit computation problems and multi-step word problems that require students to perform more than one operation to find the final answer.

A frequent challenge is keeping track of the steps. Students might correctly solve the first part of a two-step problem but then use the wrong number or operation for the second part. Teaching them to underline key information and write down the result of each step can help prevent these errors.

Wayground worksheets are available as both printable PDFs and interactive digital activities. You can print them for focused, off-screen practice that helps reduce screen time. For these printed submissions, you can use the Wayground for Teachers app to quickly scan and grade student work.

This aligns with Common Core's focus on solving two-step word problems and fluently adding and subtracting within 1000. Mastering mixed addition and subtraction is a critical prerequisite as students begin to tackle multiplication and division, which are major new topics in third grade.

Students should have a solid understanding of place value and be proficient with two-digit addition and subtraction, including with regrouping. These worksheets build on that foundation by extending the same concepts to three-digit numbers and more complex word problems.