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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 633 · 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. 1.4 + ? = 10
  2. 2.2 + ? = 10
  3. 3.75 + ? = 100
  4. 4.8 + ? = 10
  5. 5.63 + ? = 100
  6. 6.3 + ? = 10
  7. 7.5 + ? = 10
  8. 8.9 + ? = 10
  9. 9.42 + ? = 100
  10. 10.6 + ? = 10
  11. 11.66 + ? = 100
  12. 12.26 + ? = 100
  13. 13.15 + ? = 100
  14. 14.81 + ? = 100
  15. 15.60 + ? = 100
  16. 16.39 + ? = 100
  17. 17.1 + ? = 10
  18. 18.83 + ? = 100
  19. 19.76 + ? = 100
  20. 20.11 + ? = 100
  21. 21.47 + ? = 100
  22. 22.51 + ? = 100
  23. 23.38 + ? = 100
  24. 24.74 + ? = 100
  25. 25.23 + ? = 100
  26. 26.73 + ? = 100
  27. 27.82 + ? = 100
  28. 28.68 + ? = 100
  29. 29.77 + ? = 100
  30. 30.7 + ? = 10
  31. 31.44 + ? = 100
  32. 32.37 + ? = 100
  33. 33.22 + ? = 100
  34. 34.59 + ? = 100
  35. 35.72 + ? = 100
  36. 36.65 + ? = 100
  37. 37.67 + ? = 100
  38. 38.31 + ? = 100
  39. 39.30 + ? = 100
  40. 40.71 + ? = 100

Answer key

  1. 6
  2. 8
  3. 25
  4. 2
  5. 37
  6. 7
  7. 5
  8. 1
  9. 58
  10. 4
  11. 34
  12. 74
  13. 85
  14. 19
  15. 40
  16. 61
  17. 9
  18. 17
  19. 24
  20. 89
  21. 53
  22. 49
  23. 62
  24. 26
  25. 77
  26. 27
  27. 18
  28. 32
  29. 23
  30. 3
  31. 56
  32. 63
  33. 78
  34. 41
  35. 28
  36. 35
  37. 33
  38. 69
  39. 70
  40. 29

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