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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 89 · 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. 1.77 + ? = 100
  2. 2.14 + ? = 100
  3. 3.4 + ? = 10
  4. 4.2 + ? = 10
  5. 5.48 + ? = 100
  6. 6.5 + ? = 10
  7. 7.59 + ? = 100
  8. 8.3 + ? = 10
  9. 9.7 + ? = 10
  10. 10.1 + ? = 10
  11. 11.57 + ? = 100
  12. 12.63 + ? = 100
  13. 13.9 + ? = 10
  14. 14.88 + ? = 100
  15. 15.78 + ? = 100
  16. 16.52 + ? = 100
  17. 17.6 + ? = 10
  18. 18.12 + ? = 100
  19. 19.11 + ? = 100
  20. 20.64 + ? = 100
  21. 21.8 + ? = 10
  22. 22.73 + ? = 100
  23. 23.17 + ? = 100
  24. 24.45 + ? = 100
  25. 25.28 + ? = 100
  26. 26.61 + ? = 100
  27. 27.33 + ? = 100
  28. 28.53 + ? = 100
  29. 29.35 + ? = 100
  30. 30.24 + ? = 100
  31. 31.22 + ? = 100
  32. 32.13 + ? = 100
  33. 33.36 + ? = 100
  34. 34.37 + ? = 100
  35. 35.25 + ? = 100
  36. 36.60 + ? = 100
  37. 37.15 + ? = 100
  38. 38.26 + ? = 100
  39. 39.85 + ? = 100
  40. 40.51 + ? = 100

Answer key

  1. 23
  2. 86
  3. 6
  4. 8
  5. 52
  6. 5
  7. 41
  8. 7
  9. 3
  10. 9
  11. 43
  12. 37
  13. 1
  14. 12
  15. 22
  16. 48
  17. 4
  18. 88
  19. 89
  20. 36
  21. 2
  22. 27
  23. 83
  24. 55
  25. 72
  26. 39
  27. 67
  28. 47
  29. 65
  30. 76
  31. 78
  32. 87
  33. 64
  34. 63
  35. 75
  36. 40
  37. 85
  38. 74
  39. 15
  40. 49

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