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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 674 · 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. 1.6 + ? = 10
  2. 2.24 + ? = 100
  3. 3.37 + ? = 100
  4. 4.17 + ? = 100
  5. 5.3 + ? = 10
  6. 6.5 + ? = 10
  7. 7.22 + ? = 100
  8. 8.2 + ? = 10
  9. 9.7 + ? = 10
  10. 10.55 + ? = 100
  11. 11.4 + ? = 10
  12. 12.83 + ? = 100
  13. 13.1 + ? = 10
  14. 14.33 + ? = 100
  15. 15.20 + ? = 100
  16. 16.76 + ? = 100
  17. 17.35 + ? = 100
  18. 18.77 + ? = 100
  19. 19.14 + ? = 100
  20. 20.19 + ? = 100
  21. 21.70 + ? = 100
  22. 22.9 + ? = 10
  23. 23.87 + ? = 100
  24. 24.74 + ? = 100
  25. 25.52 + ? = 100
  26. 26.81 + ? = 100
  27. 27.45 + ? = 100
  28. 28.47 + ? = 100
  29. 29.61 + ? = 100
  30. 30.25 + ? = 100
  31. 31.39 + ? = 100
  32. 32.8 + ? = 10
  33. 33.34 + ? = 100
  34. 34.42 + ? = 100
  35. 35.11 + ? = 100
  36. 36.21 + ? = 100
  37. 37.75 + ? = 100
  38. 38.26 + ? = 100
  39. 39.49 + ? = 100
  40. 40.15 + ? = 100

Answer key

  1. 4
  2. 76
  3. 63
  4. 83
  5. 7
  6. 5
  7. 78
  8. 8
  9. 3
  10. 45
  11. 6
  12. 17
  13. 9
  14. 67
  15. 80
  16. 24
  17. 65
  18. 23
  19. 86
  20. 81
  21. 30
  22. 1
  23. 13
  24. 26
  25. 48
  26. 19
  27. 55
  28. 53
  29. 39
  30. 75
  31. 61
  32. 2
  33. 66
  34. 58
  35. 89
  36. 79
  37. 25
  38. 74
  39. 51
  40. 85

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