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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 601 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.1 + ? = 10
  2. 2.78 + ? = 100
  3. 3.3 + ? = 10
  4. 4.7 + ? = 10
  5. 5.72 + ? = 100
  6. 6.39 + ? = 100
  7. 7.49 + ? = 100
  8. 8.17 + ? = 100
  9. 9.9 + ? = 10
  10. 10.56 + ? = 100
  11. 11.4 + ? = 10
  12. 12.36 + ? = 100
  13. 13.43 + ? = 100
  14. 14.52 + ? = 100
  15. 15.6 + ? = 10
  16. 16.2 + ? = 10
  17. 17.48 + ? = 100
  18. 18.5 + ? = 10
  19. 19.38 + ? = 100
  20. 20.22 + ? = 100
  21. 21.75 + ? = 100
  22. 22.84 + ? = 100
  23. 23.41 + ? = 100
  24. 24.76 + ? = 100
  25. 25.13 + ? = 100
  26. 26.79 + ? = 100
  27. 27.74 + ? = 100
  28. 28.31 + ? = 100
  29. 29.28 + ? = 100
  30. 30.87 + ? = 100
  31. 31.12 + ? = 100
  32. 32.88 + ? = 100
  33. 33.8 + ? = 10
  34. 34.30 + ? = 100
  35. 35.16 + ? = 100
  36. 36.33 + ? = 100
  37. 37.24 + ? = 100
  38. 38.46 + ? = 100
  39. 39.80 + ? = 100
  40. 40.83 + ? = 100

Answer key

  1. 9
  2. 22
  3. 7
  4. 3
  5. 28
  6. 61
  7. 51
  8. 83
  9. 1
  10. 44
  11. 6
  12. 64
  13. 57
  14. 48
  15. 4
  16. 8
  17. 52
  18. 5
  19. 62
  20. 78
  21. 25
  22. 16
  23. 59
  24. 24
  25. 87
  26. 21
  27. 26
  28. 69
  29. 72
  30. 13
  31. 88
  32. 12
  33. 2
  34. 70
  35. 84
  36. 67
  37. 76
  38. 54
  39. 20
  40. 17

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