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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 64 · 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. 1.47 + ? = 100
  2. 2.5 + ? = 10
  3. 3.25 + ? = 100
  4. 4.1 + ? = 10
  5. 5.8 + ? = 10
  6. 6.17 + ? = 100
  7. 7.63 + ? = 100
  8. 8.7 + ? = 10
  9. 9.75 + ? = 100
  10. 10.4 + ? = 10
  11. 11.9 + ? = 10
  12. 12.11 + ? = 100
  13. 13.45 + ? = 100
  14. 14.72 + ? = 100
  15. 15.82 + ? = 100
  16. 16.51 + ? = 100
  17. 17.83 + ? = 100
  18. 18.29 + ? = 100
  19. 19.6 + ? = 10
  20. 20.37 + ? = 100
  21. 21.3 + ? = 10
  22. 22.64 + ? = 100
  23. 23.73 + ? = 100
  24. 24.2 + ? = 10
  25. 25.23 + ? = 100
  26. 26.38 + ? = 100
  27. 27.20 + ? = 100
  28. 28.52 + ? = 100
  29. 29.46 + ? = 100
  30. 30.78 + ? = 100
  31. 31.55 + ? = 100
  32. 32.54 + ? = 100
  33. 33.22 + ? = 100
  34. 34.89 + ? = 100
  35. 35.62 + ? = 100
  36. 36.12 + ? = 100
  37. 37.41 + ? = 100
  38. 38.84 + ? = 100
  39. 39.76 + ? = 100
  40. 40.33 + ? = 100

Answer key

  1. 53
  2. 5
  3. 75
  4. 9
  5. 2
  6. 83
  7. 37
  8. 3
  9. 25
  10. 6
  11. 1
  12. 89
  13. 55
  14. 28
  15. 18
  16. 49
  17. 17
  18. 71
  19. 4
  20. 63
  21. 7
  22. 36
  23. 27
  24. 8
  25. 77
  26. 62
  27. 80
  28. 48
  29. 54
  30. 22
  31. 45
  32. 46
  33. 78
  34. 11
  35. 38
  36. 88
  37. 59
  38. 16
  39. 24
  40. 67

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