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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 461 · 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. 1.3 + ? = 10
  2. 2.41 + ? = 100
  3. 3.71 + ? = 100
  4. 4.8 + ? = 10
  5. 5.9 + ? = 10
  6. 6.70 + ? = 100
  7. 7.65 + ? = 100
  8. 8.56 + ? = 100
  9. 9.1 + ? = 10
  10. 10.49 + ? = 100
  11. 11.4 + ? = 10
  12. 12.28 + ? = 100
  13. 13.5 + ? = 10
  14. 14.79 + ? = 100
  15. 15.18 + ? = 100
  16. 16.22 + ? = 100
  17. 17.27 + ? = 100
  18. 18.62 + ? = 100
  19. 19.39 + ? = 100
  20. 20.80 + ? = 100
  21. 21.52 + ? = 100
  22. 22.6 + ? = 10
  23. 23.85 + ? = 100
  24. 24.38 + ? = 100
  25. 25.7 + ? = 10
  26. 26.40 + ? = 100
  27. 27.13 + ? = 100
  28. 28.19 + ? = 100
  29. 29.25 + ? = 100
  30. 30.44 + ? = 100
  31. 31.2 + ? = 10
  32. 32.15 + ? = 100
  33. 33.77 + ? = 100
  34. 34.11 + ? = 100
  35. 35.73 + ? = 100
  36. 36.31 + ? = 100
  37. 37.87 + ? = 100
  38. 38.86 + ? = 100
  39. 39.51 + ? = 100
  40. 40.12 + ? = 100

Answer key

  1. 7
  2. 59
  3. 29
  4. 2
  5. 1
  6. 30
  7. 35
  8. 44
  9. 9
  10. 51
  11. 6
  12. 72
  13. 5
  14. 21
  15. 82
  16. 78
  17. 73
  18. 38
  19. 61
  20. 20
  21. 48
  22. 4
  23. 15
  24. 62
  25. 3
  26. 60
  27. 87
  28. 81
  29. 75
  30. 56
  31. 8
  32. 85
  33. 23
  34. 89
  35. 27
  36. 69
  37. 13
  38. 14
  39. 49
  40. 88

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