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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 691 · 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. 1.1 + ? = 10
  2. 2.29 + ? = 100
  3. 3.80 + ? = 100
  4. 4.37 + ? = 100
  5. 5.31 + ? = 100
  6. 6.9 + ? = 10
  7. 7.85 + ? = 100
  8. 8.40 + ? = 100
  9. 9.7 + ? = 10
  10. 10.52 + ? = 100
  11. 11.12 + ? = 100
  12. 12.5 + ? = 10
  13. 13.2 + ? = 10
  14. 14.3 + ? = 10
  15. 15.4 + ? = 10
  16. 16.6 + ? = 10
  17. 17.26 + ? = 100
  18. 18.42 + ? = 100
  19. 19.59 + ? = 100
  20. 20.83 + ? = 100
  21. 21.41 + ? = 100
  22. 22.19 + ? = 100
  23. 23.23 + ? = 100
  24. 24.13 + ? = 100
  25. 25.51 + ? = 100
  26. 26.63 + ? = 100
  27. 27.8 + ? = 10
  28. 28.39 + ? = 100
  29. 29.47 + ? = 100
  30. 30.55 + ? = 100
  31. 31.82 + ? = 100
  32. 32.87 + ? = 100
  33. 33.60 + ? = 100
  34. 34.17 + ? = 100
  35. 35.22 + ? = 100
  36. 36.18 + ? = 100
  37. 37.58 + ? = 100
  38. 38.16 + ? = 100
  39. 39.78 + ? = 100
  40. 40.46 + ? = 100

Answer key

  1. 9
  2. 71
  3. 20
  4. 63
  5. 69
  6. 1
  7. 15
  8. 60
  9. 3
  10. 48
  11. 88
  12. 5
  13. 8
  14. 7
  15. 6
  16. 4
  17. 74
  18. 58
  19. 41
  20. 17
  21. 59
  22. 81
  23. 77
  24. 87
  25. 49
  26. 37
  27. 2
  28. 61
  29. 53
  30. 45
  31. 18
  32. 13
  33. 40
  34. 83
  35. 78
  36. 82
  37. 42
  38. 84
  39. 22
  40. 54

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