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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 127 · 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. 1.34 + ? = 100
  2. 2.19 + ? = 100
  3. 3.2 + ? = 10
  4. 4.24 + ? = 100
  5. 5.27 + ? = 100
  6. 6.6 + ? = 10
  7. 7.3 + ? = 10
  8. 8.67 + ? = 100
  9. 9.57 + ? = 100
  10. 10.77 + ? = 100
  11. 11.4 + ? = 10
  12. 12.15 + ? = 100
  13. 13.5 + ? = 10
  14. 14.9 + ? = 10
  15. 15.21 + ? = 100
  16. 16.8 + ? = 10
  17. 17.72 + ? = 100
  18. 18.40 + ? = 100
  19. 19.56 + ? = 100
  20. 20.1 + ? = 10
  21. 21.81 + ? = 100
  22. 22.38 + ? = 100
  23. 23.7 + ? = 10
  24. 24.87 + ? = 100
  25. 25.76 + ? = 100
  26. 26.14 + ? = 100
  27. 27.89 + ? = 100
  28. 28.11 + ? = 100
  29. 29.78 + ? = 100
  30. 30.43 + ? = 100
  31. 31.73 + ? = 100
  32. 32.69 + ? = 100
  33. 33.74 + ? = 100
  34. 34.48 + ? = 100
  35. 35.51 + ? = 100
  36. 36.70 + ? = 100
  37. 37.54 + ? = 100
  38. 38.53 + ? = 100
  39. 39.31 + ? = 100
  40. 40.83 + ? = 100

Answer key

  1. 66
  2. 81
  3. 8
  4. 76
  5. 73
  6. 4
  7. 7
  8. 33
  9. 43
  10. 23
  11. 6
  12. 85
  13. 5
  14. 1
  15. 79
  16. 2
  17. 28
  18. 60
  19. 44
  20. 9
  21. 19
  22. 62
  23. 3
  24. 13
  25. 24
  26. 86
  27. 11
  28. 89
  29. 22
  30. 57
  31. 27
  32. 31
  33. 26
  34. 52
  35. 49
  36. 30
  37. 46
  38. 47
  39. 69
  40. 17

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