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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 429 · 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. 1.2 + ? = 10
  2. 2.9 + ? = 10
  3. 3.21 + ? = 100
  4. 4.3 + ? = 10
  5. 5.33 + ? = 100
  6. 6.11 + ? = 100
  7. 7.60 + ? = 100
  8. 8.39 + ? = 100
  9. 9.16 + ? = 100
  10. 10.51 + ? = 100
  11. 11.6 + ? = 10
  12. 12.4 + ? = 10
  13. 13.36 + ? = 100
  14. 14.19 + ? = 100
  15. 15.50 + ? = 100
  16. 16.5 + ? = 10
  17. 17.73 + ? = 100
  18. 18.59 + ? = 100
  19. 19.76 + ? = 100
  20. 20.12 + ? = 100
  21. 21.41 + ? = 100
  22. 22.63 + ? = 100
  23. 23.17 + ? = 100
  24. 24.46 + ? = 100
  25. 25.68 + ? = 100
  26. 26.89 + ? = 100
  27. 27.34 + ? = 100
  28. 28.8 + ? = 10
  29. 29.85 + ? = 100
  30. 30.66 + ? = 100
  31. 31.7 + ? = 10
  32. 32.1 + ? = 10
  33. 33.78 + ? = 100
  34. 34.52 + ? = 100
  35. 35.37 + ? = 100
  36. 36.87 + ? = 100
  37. 37.77 + ? = 100
  38. 38.18 + ? = 100
  39. 39.28 + ? = 100
  40. 40.49 + ? = 100

Answer key

  1. 8
  2. 1
  3. 79
  4. 7
  5. 67
  6. 89
  7. 40
  8. 61
  9. 84
  10. 49
  11. 4
  12. 6
  13. 64
  14. 81
  15. 50
  16. 5
  17. 27
  18. 41
  19. 24
  20. 88
  21. 59
  22. 37
  23. 83
  24. 54
  25. 32
  26. 11
  27. 66
  28. 2
  29. 15
  30. 34
  31. 3
  32. 9
  33. 22
  34. 48
  35. 63
  36. 13
  37. 23
  38. 82
  39. 72
  40. 51

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