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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 596 · 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. 1.1 + ? = 10
  2. 2.9 + ? = 10
  3. 3.16 + ? = 100
  4. 4.4 + ? = 10
  5. 5.7 + ? = 10
  6. 6.23 + ? = 100
  7. 7.5 + ? = 10
  8. 8.3 + ? = 10
  9. 9.30 + ? = 100
  10. 10.43 + ? = 100
  11. 11.2 + ? = 10
  12. 12.46 + ? = 100
  13. 13.84 + ? = 100
  14. 14.85 + ? = 100
  15. 15.44 + ? = 100
  16. 16.81 + ? = 100
  17. 17.37 + ? = 100
  18. 18.28 + ? = 100
  19. 19.38 + ? = 100
  20. 20.60 + ? = 100
  21. 21.31 + ? = 100
  22. 22.27 + ? = 100
  23. 23.34 + ? = 100
  24. 24.79 + ? = 100
  25. 25.49 + ? = 100
  26. 26.47 + ? = 100
  27. 27.64 + ? = 100
  28. 28.8 + ? = 10
  29. 29.13 + ? = 100
  30. 30.65 + ? = 100
  31. 31.75 + ? = 100
  32. 32.18 + ? = 100
  33. 33.6 + ? = 10
  34. 34.11 + ? = 100
  35. 35.39 + ? = 100
  36. 36.72 + ? = 100
  37. 37.69 + ? = 100
  38. 38.76 + ? = 100
  39. 39.62 + ? = 100
  40. 40.73 + ? = 100

Answer key

  1. 9
  2. 1
  3. 84
  4. 6
  5. 3
  6. 77
  7. 5
  8. 7
  9. 70
  10. 57
  11. 8
  12. 54
  13. 16
  14. 15
  15. 56
  16. 19
  17. 63
  18. 72
  19. 62
  20. 40
  21. 69
  22. 73
  23. 66
  24. 21
  25. 51
  26. 53
  27. 36
  28. 2
  29. 87
  30. 35
  31. 25
  32. 82
  33. 4
  34. 89
  35. 61
  36. 28
  37. 31
  38. 24
  39. 38
  40. 27

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