Math Drill Pages

Multi Digit Addition Worksheets: 5 and 6 Digits

This 4th grade sheet has 12 stacked problems for adding large numbers: Part A has 6 problems of 5 digit addition and Part B has 6 problems of 6 digit addition. Every problem needs regrouping in at least two columns, no number ends in zero, and every sum is less than 1,000,000.

Grade
Grade 4
Problems
12
Time
About 20 minutes
Standard
4.NBT.B.4
Download PDF (US Letter) Download PDF (A4)

Two pages: the worksheet, then the answer key. No sign-up needed.

Worksheet preview

Part A Add the 5-digit numbers. Start with the ones column.

  1. 66393+ 96647163040
  2. 98344+ 42498140842
  3. 87143+ 31381118524
  4. 19918+ 1031430232
  5. 18202+ 3395652158
  6. 95211+ 64095159306

Part B Add the 6-digit numbers. Estimate first, then check your answer against it.

  1. 385938+ 204612590550
  2. 169048+ 198238367286
  3. 480479+ 445293925772
  4. 578126+ 366578944704
  5. 291295+ 620851912146
  6. 368051+ 270055638106

Tips for teachers and parents

  • Same method as 4-digit addition, just more columns: add right to left and carry whenever a column reaches 10.
  • Read each number aloud with its place value, such as "385 thousand, 938", before adding. It helps students keep track of the columns.
  • Estimate to the nearest hundred thousand in Part B: 385,938 + 204,612 is about 400,000 + 200,000 = 600,000.
  • Graph paper or lined paper turned sideways keeps six columns of digits straight.

Common mistakes

  • Skipping a carry in the middle of a long row of columns. Ask students to write each carried 1 above the next column before adding it.
  • Leaving out the final carry, so a sum like 163,040 is written as 63,040. If the last column makes 10 or more, write both digits.

What to practice next

Practice multi-digit subtraction with 5- and 6-digit numbers.

Frequently asked questions

What grade learns multi-digit addition?

Grade 4. Common Core 4.NBT.B.4 asks students to fluently add multi-digit whole numbers up to 1,000,000 with the standard algorithm.

Do all the problems need regrouping?

Yes. Every problem needs a carry in at least two columns.

Is there an answer key?

Yes, page 2 of the PDF shows all 12 answers.