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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 588 · 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. 1.29 + ? = 100
  2. 2.35 + ? = 100
  3. 3.39 + ? = 100
  4. 4.44 + ? = 100
  5. 5.2 + ? = 10
  6. 6.49 + ? = 100
  7. 7.4 + ? = 10
  8. 8.25 + ? = 100
  9. 9.60 + ? = 100
  10. 10.73 + ? = 100
  11. 11.5 + ? = 10
  12. 12.36 + ? = 100
  13. 13.21 + ? = 100
  14. 14.24 + ? = 100
  15. 15.68 + ? = 100
  16. 16.6 + ? = 10
  17. 17.75 + ? = 100
  18. 18.7 + ? = 10
  19. 19.86 + ? = 100
  20. 20.34 + ? = 100
  21. 21.11 + ? = 100
  22. 22.22 + ? = 100
  23. 23.1 + ? = 10
  24. 24.55 + ? = 100
  25. 25.83 + ? = 100
  26. 26.88 + ? = 100
  27. 27.17 + ? = 100
  28. 28.8 + ? = 10
  29. 29.43 + ? = 100
  30. 30.87 + ? = 100
  31. 31.28 + ? = 100
  32. 32.3 + ? = 10
  33. 33.27 + ? = 100
  34. 34.9 + ? = 10
  35. 35.23 + ? = 100
  36. 36.18 + ? = 100
  37. 37.37 + ? = 100
  38. 38.82 + ? = 100
  39. 39.12 + ? = 100
  40. 40.67 + ? = 100

Answer key

  1. 71
  2. 65
  3. 61
  4. 56
  5. 8
  6. 51
  7. 6
  8. 75
  9. 40
  10. 27
  11. 5
  12. 64
  13. 79
  14. 76
  15. 32
  16. 4
  17. 25
  18. 3
  19. 14
  20. 66
  21. 89
  22. 78
  23. 9
  24. 45
  25. 17
  26. 12
  27. 83
  28. 2
  29. 57
  30. 13
  31. 72
  32. 7
  33. 73
  34. 1
  35. 77
  36. 82
  37. 63
  38. 18
  39. 88
  40. 33

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