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Make 10 worksheets

Fill in the missing number that makes 10: 3 + ___ = 10, ___ + 8 = 10. Three versions of twenty problems with answer keys.

Missing number in a sum: make 10

NameDate

Write the missing number.

  1. + 2 = 10
  2. + 4 = 10
  3. 8 + = 10
  4. 2 + = 10
  5. + 5 = 10
  6. 7 + = 10
  7. + 3 = 10
  8. 5 + = 10
  9. 4 + = 10
  10. 9 + = 10
  11. + 1 = 10
  12. 3 + = 10
  13. 6 + = 10
  14. + 7 = 10
  15. + 6 = 10
  16. 1 + = 10
  17. + 9 = 10
  18. + 8 = 10
  19. 9 + = 10
  20. + 5 = 10
Sheet AFree at teach.peabody.kids

Missing number in a sum: make 10

NameDate

Write the missing number.

  1. + 7 = 10
  2. 2 + = 10
  3. + 1 = 10
  4. 3 + = 10
  5. + 4 = 10
  6. + 5 = 10
  7. 1 + = 10
  8. 5 + = 10
  9. + 6 = 10
  10. + 8 = 10
  11. + 2 = 10
  12. 7 + = 10
  13. + 3 = 10
  14. 6 + = 10
  15. 8 + = 10
  16. + 9 = 10
  17. 4 + = 10
  18. 9 + = 10
  19. 2 + = 10
  20. + 4 = 10
Sheet BFree at teach.peabody.kids

Missing number in a sum: make 10

NameDate

Write the missing number.

  1. + 1 = 10
  2. + 7 = 10
  3. + 4 = 10
  4. + 3 = 10
  5. + 5 = 10
  6. 9 + = 10
  7. 8 + = 10
  8. + 6 = 10
  9. 3 + = 10
  10. 5 + = 10
  11. + 9 = 10
  12. 2 + = 10
  13. 6 + = 10
  14. 1 + = 10
  15. 7 + = 10
  16. + 8 = 10
  17. 4 + = 10
  18. + 2 = 10
  19. 6 + = 10
  20. 6 + = 10
Sheet CFree at teach.peabody.kids

Answer key

Sheet A

  1. 8
  2. 6
  3. 2
  4. 8
  5. 5
  6. 3
  7. 7
  8. 5
  9. 6
  10. 1
  11. 9
  12. 7
  13. 4
  14. 3
  15. 4
  16. 9
  17. 1
  18. 2
  19. 1
  20. 5

Sheet B

  1. 3
  2. 8
  3. 9
  4. 7
  5. 6
  6. 5
  7. 9
  8. 5
  9. 4
  10. 2
  11. 8
  12. 3
  13. 7
  14. 4
  15. 2
  16. 1
  17. 6
  18. 1
  19. 8
  20. 6

Sheet C

  1. 9
  2. 3
  3. 6
  4. 7
  5. 5
  6. 1
  7. 2
  8. 4
  9. 7
  10. 5
  11. 1
  12. 8
  13. 4
  14. 9
  15. 3
  16. 2
  17. 6
  18. 8
  19. 4
  20. 4
Answer keyFree at teach.peabody.kids

Missing number in a sum: 20 problems a sheet, 3 versions that do not repeat each other where the numbers allow.

How to use it

  1. Look at the sheet: it is a real, printable sheet. Switch between Sheet A, B and C, or press New numbers (N) for a fresh set.
  2. Change how many problems, how many versions, and whether the key prints. Settings stay in this browser; Share copies a link that rebuilds the same sheets.
  3. Press Print sheet A and key, or Print all. The answer key prints on its own page, so you can keep it back.

Ideas for class

  • Keep a ten frame on the wall and point to it as students work. Within a week most children stop looking.
  • Ask for pairs in a chant: I say seven, you say three. Do it before the sheet, so the sound of the pairs is already in their heads.
  • Have students color the two parts of each fact on a ten frame, one color for each number, before writing the answer.

Related

Questions

Why is the blank sometimes first?

A blank at the start, as in ___ + 8 = 10, checks that students understand the sentence and have not memorized one pattern. It is the same fact written the other way round.

Can I make a sheet for sums of 20?

Yes. Open the sheet in the maker, choose Missing number in a sum, and set the range to Make 20. The same sheet also has Within 10, Within 20 and Within 100 versions.

Are the answer keys checked?

Each answer is worked out by the code that wrote the problem, and our tests recompute every answer a second way and compare. Please still look over the key before you grade a class set.

Nothing you do here is sent to us. Names, lists and settings stay in this browser. No sign-in, no ads.

What this worksheet covers

The pairs that make 10 are the most useful facts in early arithmetic. They anchor every later strategy, from adding 8 + 5 by taking 2 to make ten, to regrouping in two-digit addition. Each problem here shows one number and leaves a blank for its partner, and some are written the other way round so that the blank is not always in the same place.

Who it is for

Kindergarten children begin with this: Common Core K.OA.A.4 asks them to find the number that makes 10 when added to a given number from 1 to 9. First graders should have it automatic. A child who is slow on this sheet will be slow on almost everything that follows.

Finding the number that makes 10 with the number shown · Kindergarten and grade 1

A worked example

For 6 + ___ = 10, show six counters on a ten frame and ask how many empty squares are left. Four. Then write 6 + 4 = 10. Next show 4 + ___ = 10 and ask whether the answer will be the same six, and why.

Mistakes to watch for

  • Giving the number that is already shown, for example 4 for 4 + ___ = 10. Cover the blank and read what the sentence says.
  • Answering with the total, writing 10 in the blank. Ask what is added to the first number to reach ten.

Make it your own

This sheet is one setting of the math worksheet generator. Open it there to change the skill, the range of numbers or the heading, or to mix several skills on one sheet.