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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 235 · 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. 1.22 + ? = 100
  2. 2.7 + ? = 10
  3. 3.3 + ? = 10
  4. 4.74 + ? = 100
  5. 5.5 + ? = 10
  6. 6.23 + ? = 100
  7. 7.9 + ? = 10
  8. 8.87 + ? = 100
  9. 9.17 + ? = 100
  10. 10.57 + ? = 100
  11. 11.69 + ? = 100
  12. 12.2 + ? = 10
  13. 13.4 + ? = 10
  14. 14.24 + ? = 100
  15. 15.1 + ? = 10
  16. 16.25 + ? = 100
  17. 17.11 + ? = 100
  18. 18.35 + ? = 100
  19. 19.76 + ? = 100
  20. 20.88 + ? = 100
  21. 21.14 + ? = 100
  22. 22.89 + ? = 100
  23. 23.58 + ? = 100
  24. 24.49 + ? = 100
  25. 25.86 + ? = 100
  26. 26.66 + ? = 100
  27. 27.19 + ? = 100
  28. 28.40 + ? = 100
  29. 29.64 + ? = 100
  30. 30.15 + ? = 100
  31. 31.51 + ? = 100
  32. 32.71 + ? = 100
  33. 33.53 + ? = 100
  34. 34.8 + ? = 10
  35. 35.83 + ? = 100
  36. 36.27 + ? = 100
  37. 37.47 + ? = 100
  38. 38.45 + ? = 100
  39. 39.67 + ? = 100
  40. 40.32 + ? = 100

Answer key

  1. 78
  2. 3
  3. 7
  4. 26
  5. 5
  6. 77
  7. 1
  8. 13
  9. 83
  10. 43
  11. 31
  12. 8
  13. 6
  14. 76
  15. 9
  16. 75
  17. 89
  18. 65
  19. 24
  20. 12
  21. 86
  22. 11
  23. 42
  24. 51
  25. 14
  26. 34
  27. 81
  28. 60
  29. 36
  30. 85
  31. 49
  32. 29
  33. 47
  34. 2
  35. 17
  36. 73
  37. 53
  38. 55
  39. 33
  40. 68

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