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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 169 · 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. 1.33 + ? = 100
  2. 2.9 + ? = 10
  3. 3.25 + ? = 100
  4. 4.4 + ? = 10
  5. 5.11 + ? = 100
  6. 6.7 + ? = 10
  7. 7.5 + ? = 10
  8. 8.8 + ? = 10
  9. 9.35 + ? = 100
  10. 10.44 + ? = 100
  11. 11.45 + ? = 100
  12. 12.59 + ? = 100
  13. 13.84 + ? = 100
  14. 14.2 + ? = 10
  15. 15.26 + ? = 100
  16. 16.1 + ? = 10
  17. 17.49 + ? = 100
  18. 18.37 + ? = 100
  19. 19.17 + ? = 100
  20. 20.51 + ? = 100
  21. 21.13 + ? = 100
  22. 22.32 + ? = 100
  23. 23.76 + ? = 100
  24. 24.67 + ? = 100
  25. 25.15 + ? = 100
  26. 26.86 + ? = 100
  27. 27.54 + ? = 100
  28. 28.3 + ? = 10
  29. 29.29 + ? = 100
  30. 30.23 + ? = 100
  31. 31.83 + ? = 100
  32. 32.71 + ? = 100
  33. 33.43 + ? = 100
  34. 34.6 + ? = 10
  35. 35.88 + ? = 100
  36. 36.73 + ? = 100
  37. 37.40 + ? = 100
  38. 38.89 + ? = 100
  39. 39.65 + ? = 100
  40. 40.21 + ? = 100

Answer key

  1. 67
  2. 1
  3. 75
  4. 6
  5. 89
  6. 3
  7. 5
  8. 2
  9. 65
  10. 56
  11. 55
  12. 41
  13. 16
  14. 8
  15. 74
  16. 9
  17. 51
  18. 63
  19. 83
  20. 49
  21. 87
  22. 68
  23. 24
  24. 33
  25. 85
  26. 14
  27. 46
  28. 7
  29. 71
  30. 77
  31. 17
  32. 29
  33. 57
  34. 4
  35. 12
  36. 27
  37. 60
  38. 11
  39. 35
  40. 79

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