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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 222 · 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. 1.15 + ? = 100
  2. 2.5 + ? = 10
  3. 3.31 + ? = 100
  4. 4.29 + ? = 100
  5. 5.3 + ? = 10
  6. 6.81 + ? = 100
  7. 7.28 + ? = 100
  8. 8.76 + ? = 100
  9. 9.67 + ? = 100
  10. 10.1 + ? = 10
  11. 11.9 + ? = 10
  12. 12.6 + ? = 10
  13. 13.61 + ? = 100
  14. 14.45 + ? = 100
  15. 15.85 + ? = 100
  16. 16.8 + ? = 10
  17. 17.84 + ? = 100
  18. 18.7 + ? = 10
  19. 19.18 + ? = 100
  20. 20.2 + ? = 10
  21. 21.63 + ? = 100
  22. 22.4 + ? = 10
  23. 23.87 + ? = 100
  24. 24.32 + ? = 100
  25. 25.43 + ? = 100
  26. 26.75 + ? = 100
  27. 27.11 + ? = 100
  28. 28.86 + ? = 100
  29. 29.89 + ? = 100
  30. 30.40 + ? = 100
  31. 31.53 + ? = 100
  32. 32.50 + ? = 100
  33. 33.72 + ? = 100
  34. 34.69 + ? = 100
  35. 35.80 + ? = 100
  36. 36.82 + ? = 100
  37. 37.16 + ? = 100
  38. 38.14 + ? = 100
  39. 39.25 + ? = 100
  40. 40.49 + ? = 100

Answer key

  1. 85
  2. 5
  3. 69
  4. 71
  5. 7
  6. 19
  7. 72
  8. 24
  9. 33
  10. 9
  11. 1
  12. 4
  13. 39
  14. 55
  15. 15
  16. 2
  17. 16
  18. 3
  19. 82
  20. 8
  21. 37
  22. 6
  23. 13
  24. 68
  25. 57
  26. 25
  27. 89
  28. 14
  29. 11
  30. 60
  31. 47
  32. 50
  33. 28
  34. 31
  35. 20
  36. 18
  37. 84
  38. 86
  39. 75
  40. 51

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