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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 271 · 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. 2.74 + ? = 100
  3. 3.34 + ? = 100
  4. 4.5 + ? = 10
  5. 5.9 + ? = 10
  6. 6.6 + ? = 10
  7. 7.8 + ? = 10
  8. 8.76 + ? = 100
  9. 9.22 + ? = 100
  10. 10.55 + ? = 100
  11. 11.30 + ? = 100
  12. 12.32 + ? = 100
  13. 13.59 + ? = 100
  14. 14.3 + ? = 10
  15. 15.29 + ? = 100
  16. 16.4 + ? = 10
  17. 17.7 + ? = 10
  18. 18.82 + ? = 100
  19. 19.2 + ? = 10
  20. 20.38 + ? = 100
  21. 21.83 + ? = 100
  22. 22.63 + ? = 100
  23. 23.58 + ? = 100
  24. 24.13 + ? = 100
  25. 25.46 + ? = 100
  26. 26.78 + ? = 100
  27. 27.11 + ? = 100
  28. 28.51 + ? = 100
  29. 29.84 + ? = 100
  30. 30.16 + ? = 100
  31. 31.33 + ? = 100
  32. 32.14 + ? = 100
  33. 33.43 + ? = 100
  34. 34.62 + ? = 100
  35. 35.25 + ? = 100
  36. 36.31 + ? = 100
  37. 37.60 + ? = 100
  38. 38.41 + ? = 100
  39. 39.88 + ? = 100
  40. 40.17 + ? = 100

Answer key

  1. 9
  2. 26
  3. 66
  4. 5
  5. 1
  6. 4
  7. 2
  8. 24
  9. 78
  10. 45
  11. 70
  12. 68
  13. 41
  14. 7
  15. 71
  16. 6
  17. 3
  18. 18
  19. 8
  20. 62
  21. 17
  22. 37
  23. 42
  24. 87
  25. 54
  26. 22
  27. 89
  28. 49
  29. 16
  30. 84
  31. 67
  32. 86
  33. 57
  34. 38
  35. 75
  36. 69
  37. 40
  38. 59
  39. 12
  40. 83

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