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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 181 · 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. 1.34 + ? = 100
  2. 2.3 + ? = 10
  3. 3.67 + ? = 100
  4. 4.16 + ? = 100
  5. 5.27 + ? = 100
  6. 6.4 + ? = 10
  7. 7.81 + ? = 100
  8. 8.63 + ? = 100
  9. 9.33 + ? = 100
  10. 10.18 + ? = 100
  11. 11.2 + ? = 10
  12. 12.8 + ? = 10
  13. 13.9 + ? = 10
  14. 14.60 + ? = 100
  15. 15.17 + ? = 100
  16. 16.57 + ? = 100
  17. 17.71 + ? = 100
  18. 18.49 + ? = 100
  19. 19.50 + ? = 100
  20. 20.13 + ? = 100
  21. 21.29 + ? = 100
  22. 22.6 + ? = 10
  23. 23.53 + ? = 100
  24. 24.40 + ? = 100
  25. 25.7 + ? = 10
  26. 26.52 + ? = 100
  27. 27.54 + ? = 100
  28. 28.86 + ? = 100
  29. 29.77 + ? = 100
  30. 30.5 + ? = 10
  31. 31.32 + ? = 100
  32. 32.24 + ? = 100
  33. 33.1 + ? = 10
  34. 34.72 + ? = 100
  35. 35.42 + ? = 100
  36. 36.75 + ? = 100
  37. 37.38 + ? = 100
  38. 38.19 + ? = 100
  39. 39.25 + ? = 100
  40. 40.83 + ? = 100

Answer key

  1. 66
  2. 7
  3. 33
  4. 84
  5. 73
  6. 6
  7. 19
  8. 37
  9. 67
  10. 82
  11. 8
  12. 2
  13. 1
  14. 40
  15. 83
  16. 43
  17. 29
  18. 51
  19. 50
  20. 87
  21. 71
  22. 4
  23. 47
  24. 60
  25. 3
  26. 48
  27. 46
  28. 14
  29. 23
  30. 5
  31. 68
  32. 76
  33. 9
  34. 28
  35. 58
  36. 25
  37. 62
  38. 81
  39. 75
  40. 17

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