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addition subtraction Worksheets

Free variable worksheets with answer key. No login or account needed. Solve addition, subtraction, multiplication, and division problems with variables. A grading column and quick grade scale maker grading a breeze and a modified pages help with lower level learners or when just introducing a topic. Great for teachers or for homeschool.

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Addition & Subtraction

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Addition & Subtraction

About these worksheets

Students solve for unknown variables in addition and subtraction equations at four levels of difficulty: within 10, within 20, within 100, and within 1,000. These worksheets build early algebraic thinking by having students find the missing number that makes each equation true. Aligned with kindergarten through third grade standards.

addition subtraction Worksheets - Add & Subtract within 10 worksheet

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Add & Subtract within 10

koa2

Use what you know about number facts within 10 to figure out an unknown quickly.
Read an equation with a letter and understand that the letter stands for a number.
Check that your answer makes the equation true by plugging the number back in.

addition subtraction Worksheets - Add & Subtract within 20 worksheet

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Add & Subtract within 20

1oa1

Solve simple addition and subtraction equations by finding the missing number.
Check that the answer makes the equation true by plugging the number back in.
Practice adding and subtracting within 20 with an unknown in different spots.

addition subtraction Worksheets - Add & Subtract within 100 worksheet

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Add & Subtract within 100

2nbt5

Solve for the missing number in simple addition and subtraction equations within 100.
Use addition and subtraction facts to figure out what value makes an equation true.
Work with equations written using a letter or symbol for the unknown number.

addition subtraction Worksheets - Add & Subtract within 1,000 worksheet

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Add & Subtract within 1,000

3nbt2

Solve for an unknown number in simple addition and subtraction equations within 1,000.
Use addition and subtraction facts to figure out what number makes an equation true.
Check that the answer makes sense by plugging the number back into the equation.

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