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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 228 · 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. 1.11 + ? = 100
  2. 2.8 + ? = 10
  3. 3.18 + ? = 100
  4. 4.1 + ? = 10
  5. 5.40 + ? = 100
  6. 6.4 + ? = 10
  7. 7.5 + ? = 10
  8. 8.24 + ? = 100
  9. 9.7 + ? = 10
  10. 10.22 + ? = 100
  11. 11.3 + ? = 10
  12. 12.63 + ? = 100
  13. 13.39 + ? = 100
  14. 14.9 + ? = 10
  15. 15.25 + ? = 100
  16. 16.81 + ? = 100
  17. 17.62 + ? = 100
  18. 18.51 + ? = 100
  19. 19.83 + ? = 100
  20. 20.71 + ? = 100
  21. 21.6 + ? = 10
  22. 22.16 + ? = 100
  23. 23.54 + ? = 100
  24. 24.52 + ? = 100
  25. 25.30 + ? = 100
  26. 26.47 + ? = 100
  27. 27.27 + ? = 100
  28. 28.68 + ? = 100
  29. 29.2 + ? = 10
  30. 30.28 + ? = 100
  31. 31.66 + ? = 100
  32. 32.87 + ? = 100
  33. 33.14 + ? = 100
  34. 34.55 + ? = 100
  35. 35.53 + ? = 100
  36. 36.21 + ? = 100
  37. 37.15 + ? = 100
  38. 38.77 + ? = 100
  39. 39.84 + ? = 100
  40. 40.65 + ? = 100

Answer key

  1. 89
  2. 2
  3. 82
  4. 9
  5. 60
  6. 6
  7. 5
  8. 76
  9. 3
  10. 78
  11. 7
  12. 37
  13. 61
  14. 1
  15. 75
  16. 19
  17. 38
  18. 49
  19. 17
  20. 29
  21. 4
  22. 84
  23. 46
  24. 48
  25. 70
  26. 53
  27. 73
  28. 32
  29. 8
  30. 72
  31. 34
  32. 13
  33. 86
  34. 45
  35. 47
  36. 79
  37. 85
  38. 23
  39. 16
  40. 35

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