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Grade 4 · Math · Place value operations

4th Grade Mental Addition and Subtraction worksheets

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Mental Addition and Subtraction

Grade 4 Math Worksheet

NameDate

Add or subtract in your head.

  1. 5,000 + 2,000 = ____

  2. 3,100 − 2,300 = ____

  3. 4,000 + 2,300 = ____

  4. 6,000 − 2,000 = ____

  5. 7,200 + 1,400 = ____

  6. 6,900 − 1,500 = ____

  7. 1,800 + 3,500 = ____

  8. 7,600 − 5,800 = ____

  9. 4,200 + 4,000 = ____

  10. 9,000 − 1,000 = ____

  11. 3,500 + 3,600 = ____

  12. 7,000 − 5,000 = ____

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4th Grade Mental Addition and Subtraction worksheet 1 – printable PDF
Download PDF: 123456

About this worksheet

Adding 3,400 + 2,500 is the fact 34 + 25 with the zeros put back, and 9,000 - 4,000 is 9 - 4. Each sheet has twelve bare problems, sums and differences in turn, with a line after the equals sign, and your child writes the answer without a column. Building Confidence uses tens and fifties inside 1,000, On Level hundreds and thousands, and Challenge Me answers that cross a thousand or ten thousand.

What your child will learn

  • Add and subtract multiples of 10, 100 and 1,000 mentally
  • Use a basic fact and put the zeros back
  • Check an answer by thinking of the opposite operation

Common Core standard: 4.NBT.B.4

Worked example

3,400 + 2,500 = 5,900, because 34 hundreds + 25 hundreds = 59 hundreds.

Common mistake

Losing a zero, so 800 + 600 becomes 140 instead of 1,400.

Helpful hint

Do the basic fact first, then say the unit: 59 hundreds is 5,900.

Questions parents ask

What is the most common mistake with mental addition and subtraction?

Losing a zero, so 800 + 600 becomes 140 instead of 1,400.

How can I help my child with mental addition and subtraction?

Do the basic fact first, then say the unit: 59 hundreds is 5,900.

Are these 4th grade math worksheets free to print?

Yes. All 6 printable versions on this page are free to download and print, with no account needed.

Similar: Add and Subtract Whole Numbers · Subtract Large Numbers

More 4th grade place value operations

See all place value operations

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