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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 137 · 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. 1.9 + ? = 10
  2. 2.6 + ? = 10
  3. 3.47 + ? = 100
  4. 4.3 + ? = 10
  5. 5.81 + ? = 100
  6. 6.5 + ? = 10
  7. 7.39 + ? = 100
  8. 8.7 + ? = 10
  9. 9.74 + ? = 100
  10. 10.35 + ? = 100
  11. 11.12 + ? = 100
  12. 12.23 + ? = 100
  13. 13.55 + ? = 100
  14. 14.11 + ? = 100
  15. 15.19 + ? = 100
  16. 16.1 + ? = 10
  17. 17.68 + ? = 100
  18. 18.8 + ? = 10
  19. 19.2 + ? = 10
  20. 20.42 + ? = 100
  21. 21.76 + ? = 100
  22. 22.14 + ? = 100
  23. 23.58 + ? = 100
  24. 24.4 + ? = 10
  25. 25.53 + ? = 100
  26. 26.69 + ? = 100
  27. 27.79 + ? = 100
  28. 28.37 + ? = 100
  29. 29.87 + ? = 100
  30. 30.65 + ? = 100
  31. 31.17 + ? = 100
  32. 32.63 + ? = 100
  33. 33.29 + ? = 100
  34. 34.38 + ? = 100
  35. 35.57 + ? = 100
  36. 36.82 + ? = 100
  37. 37.78 + ? = 100
  38. 38.33 + ? = 100
  39. 39.75 + ? = 100
  40. 40.77 + ? = 100

Answer key

  1. 1
  2. 4
  3. 53
  4. 7
  5. 19
  6. 5
  7. 61
  8. 3
  9. 26
  10. 65
  11. 88
  12. 77
  13. 45
  14. 89
  15. 81
  16. 9
  17. 32
  18. 2
  19. 8
  20. 58
  21. 24
  22. 86
  23. 42
  24. 6
  25. 47
  26. 31
  27. 21
  28. 63
  29. 13
  30. 35
  31. 83
  32. 37
  33. 71
  34. 62
  35. 43
  36. 18
  37. 22
  38. 67
  39. 25
  40. 23

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