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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 359 · 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. 1.8 + ? = 10
  2. 2.70 + ? = 100
  3. 3.89 + ? = 100
  4. 4.9 + ? = 10
  5. 5.59 + ? = 100
  6. 6.55 + ? = 100
  7. 7.3 + ? = 10
  8. 8.60 + ? = 100
  9. 9.34 + ? = 100
  10. 10.1 + ? = 10
  11. 11.77 + ? = 100
  12. 12.44 + ? = 100
  13. 13.48 + ? = 100
  14. 14.85 + ? = 100
  15. 15.2 + ? = 10
  16. 16.28 + ? = 100
  17. 17.51 + ? = 100
  18. 18.24 + ? = 100
  19. 19.41 + ? = 100
  20. 20.4 + ? = 10
  21. 21.69 + ? = 100
  22. 22.38 + ? = 100
  23. 23.64 + ? = 100
  24. 24.5 + ? = 10
  25. 25.37 + ? = 100
  26. 26.6 + ? = 10
  27. 27.23 + ? = 100
  28. 28.14 + ? = 100
  29. 29.15 + ? = 100
  30. 30.63 + ? = 100
  31. 31.66 + ? = 100
  32. 32.61 + ? = 100
  33. 33.7 + ? = 10
  34. 34.81 + ? = 100
  35. 35.52 + ? = 100
  36. 36.46 + ? = 100
  37. 37.18 + ? = 100
  38. 38.49 + ? = 100
  39. 39.47 + ? = 100
  40. 40.17 + ? = 100

Answer key

  1. 2
  2. 30
  3. 11
  4. 1
  5. 41
  6. 45
  7. 7
  8. 40
  9. 66
  10. 9
  11. 23
  12. 56
  13. 52
  14. 15
  15. 8
  16. 72
  17. 49
  18. 76
  19. 59
  20. 6
  21. 31
  22. 62
  23. 36
  24. 5
  25. 63
  26. 4
  27. 77
  28. 86
  29. 85
  30. 37
  31. 34
  32. 39
  33. 3
  34. 19
  35. 48
  36. 54
  37. 82
  38. 51
  39. 53
  40. 83

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