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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 471 · 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. 1.61 + ? = 100
  2. 2.1 + ? = 10
  3. 3.43 + ? = 100
  4. 4.9 + ? = 10
  5. 5.32 + ? = 100
  6. 6.21 + ? = 100
  7. 7.31 + ? = 100
  8. 8.38 + ? = 100
  9. 9.6 + ? = 10
  10. 10.4 + ? = 10
  11. 11.2 + ? = 10
  12. 12.50 + ? = 100
  13. 13.73 + ? = 100
  14. 14.69 + ? = 100
  15. 15.3 + ? = 10
  16. 16.29 + ? = 100
  17. 17.14 + ? = 100
  18. 18.67 + ? = 100
  19. 19.18 + ? = 100
  20. 20.70 + ? = 100
  21. 21.88 + ? = 100
  22. 22.7 + ? = 10
  23. 23.55 + ? = 100
  24. 24.5 + ? = 10
  25. 25.83 + ? = 100
  26. 26.13 + ? = 100
  27. 27.11 + ? = 100
  28. 28.76 + ? = 100
  29. 29.8 + ? = 10
  30. 30.17 + ? = 100
  31. 31.34 + ? = 100
  32. 32.82 + ? = 100
  33. 33.56 + ? = 100
  34. 34.72 + ? = 100
  35. 35.40 + ? = 100
  36. 36.84 + ? = 100
  37. 37.66 + ? = 100
  38. 38.81 + ? = 100
  39. 39.12 + ? = 100
  40. 40.19 + ? = 100

Answer key

  1. 39
  2. 9
  3. 57
  4. 1
  5. 68
  6. 79
  7. 69
  8. 62
  9. 4
  10. 6
  11. 8
  12. 50
  13. 27
  14. 31
  15. 7
  16. 71
  17. 86
  18. 33
  19. 82
  20. 30
  21. 12
  22. 3
  23. 45
  24. 5
  25. 17
  26. 87
  27. 89
  28. 24
  29. 2
  30. 83
  31. 66
  32. 18
  33. 44
  34. 28
  35. 60
  36. 16
  37. 34
  38. 19
  39. 88
  40. 81

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