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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 151 · 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. 1.68 + ? = 100
  2. 2.39 + ? = 100
  3. 3.21 + ? = 100
  4. 4.5 + ? = 10
  5. 5.9 + ? = 10
  6. 6.3 + ? = 10
  7. 7.20 + ? = 100
  8. 8.2 + ? = 10
  9. 9.27 + ? = 100
  10. 10.46 + ? = 100
  11. 11.8 + ? = 10
  12. 12.4 + ? = 10
  13. 13.11 + ? = 100
  14. 14.1 + ? = 10
  15. 15.58 + ? = 100
  16. 16.52 + ? = 100
  17. 17.18 + ? = 100
  18. 18.6 + ? = 10
  19. 19.43 + ? = 100
  20. 20.24 + ? = 100
  21. 21.30 + ? = 100
  22. 22.48 + ? = 100
  23. 23.66 + ? = 100
  24. 24.60 + ? = 100
  25. 25.19 + ? = 100
  26. 26.71 + ? = 100
  27. 27.42 + ? = 100
  28. 28.77 + ? = 100
  29. 29.55 + ? = 100
  30. 30.53 + ? = 100
  31. 31.63 + ? = 100
  32. 32.16 + ? = 100
  33. 33.36 + ? = 100
  34. 34.14 + ? = 100
  35. 35.82 + ? = 100
  36. 36.72 + ? = 100
  37. 37.31 + ? = 100
  38. 38.15 + ? = 100
  39. 39.37 + ? = 100
  40. 40.28 + ? = 100

Answer key

  1. 32
  2. 61
  3. 79
  4. 5
  5. 1
  6. 7
  7. 80
  8. 8
  9. 73
  10. 54
  11. 2
  12. 6
  13. 89
  14. 9
  15. 42
  16. 48
  17. 82
  18. 4
  19. 57
  20. 76
  21. 70
  22. 52
  23. 34
  24. 40
  25. 81
  26. 29
  27. 58
  28. 23
  29. 45
  30. 47
  31. 37
  32. 84
  33. 64
  34. 86
  35. 18
  36. 28
  37. 69
  38. 85
  39. 63
  40. 72

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