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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 384 · 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. 1.4 + ? = 10
  2. 2.54 + ? = 100
  3. 3.14 + ? = 100
  4. 4.9 + ? = 10
  5. 5.8 + ? = 10
  6. 6.1 + ? = 10
  7. 7.86 + ? = 100
  8. 8.43 + ? = 100
  9. 9.49 + ? = 100
  10. 10.2 + ? = 10
  11. 11.38 + ? = 100
  12. 12.5 + ? = 10
  13. 13.7 + ? = 10
  14. 14.6 + ? = 10
  15. 15.25 + ? = 100
  16. 16.65 + ? = 100
  17. 17.42 + ? = 100
  18. 18.24 + ? = 100
  19. 19.57 + ? = 100
  20. 20.3 + ? = 10
  21. 21.26 + ? = 100
  22. 22.60 + ? = 100
  23. 23.56 + ? = 100
  24. 24.81 + ? = 100
  25. 25.46 + ? = 100
  26. 26.12 + ? = 100
  27. 27.31 + ? = 100
  28. 28.68 + ? = 100
  29. 29.41 + ? = 100
  30. 30.76 + ? = 100
  31. 31.15 + ? = 100
  32. 32.17 + ? = 100
  33. 33.11 + ? = 100
  34. 34.33 + ? = 100
  35. 35.18 + ? = 100
  36. 36.59 + ? = 100
  37. 37.34 + ? = 100
  38. 38.73 + ? = 100
  39. 39.27 + ? = 100
  40. 40.85 + ? = 100

Answer key

  1. 6
  2. 46
  3. 86
  4. 1
  5. 2
  6. 9
  7. 14
  8. 57
  9. 51
  10. 8
  11. 62
  12. 5
  13. 3
  14. 4
  15. 75
  16. 35
  17. 58
  18. 76
  19. 43
  20. 7
  21. 74
  22. 40
  23. 44
  24. 19
  25. 54
  26. 88
  27. 69
  28. 32
  29. 59
  30. 24
  31. 85
  32. 83
  33. 89
  34. 67
  35. 82
  36. 41
  37. 66
  38. 27
  39. 73
  40. 15

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