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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 364 · 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. 1.7 + ? = 10
  2. 2.5 + ? = 10
  3. 3.85 + ? = 100
  4. 4.83 + ? = 100
  5. 5.9 + ? = 10
  6. 6.2 + ? = 10
  7. 7.4 + ? = 10
  8. 8.50 + ? = 100
  9. 9.86 + ? = 100
  10. 10.3 + ? = 10
  11. 11.33 + ? = 100
  12. 12.16 + ? = 100
  13. 13.27 + ? = 100
  14. 14.1 + ? = 10
  15. 15.8 + ? = 10
  16. 16.28 + ? = 100
  17. 17.37 + ? = 100
  18. 18.12 + ? = 100
  19. 19.88 + ? = 100
  20. 20.6 + ? = 10
  21. 21.25 + ? = 100
  22. 22.69 + ? = 100
  23. 23.70 + ? = 100
  24. 24.26 + ? = 100
  25. 25.63 + ? = 100
  26. 26.29 + ? = 100
  27. 27.41 + ? = 100
  28. 28.21 + ? = 100
  29. 29.13 + ? = 100
  30. 30.49 + ? = 100
  31. 31.53 + ? = 100
  32. 32.79 + ? = 100
  33. 33.31 + ? = 100
  34. 34.35 + ? = 100
  35. 35.77 + ? = 100
  36. 36.39 + ? = 100
  37. 37.61 + ? = 100
  38. 38.87 + ? = 100
  39. 39.62 + ? = 100
  40. 40.64 + ? = 100

Answer key

  1. 3
  2. 5
  3. 15
  4. 17
  5. 1
  6. 8
  7. 6
  8. 50
  9. 14
  10. 7
  11. 67
  12. 84
  13. 73
  14. 9
  15. 2
  16. 72
  17. 63
  18. 88
  19. 12
  20. 4
  21. 75
  22. 31
  23. 30
  24. 74
  25. 37
  26. 71
  27. 59
  28. 79
  29. 87
  30. 51
  31. 47
  32. 21
  33. 69
  34. 65
  35. 23
  36. 61
  37. 39
  38. 13
  39. 38
  40. 36

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