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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 274 · 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. 1.22 + ? = 100
  2. 2.9 + ? = 10
  3. 3.65 + ? = 100
  4. 4.32 + ? = 100
  5. 5.73 + ? = 100
  6. 6.1 + ? = 10
  7. 7.4 + ? = 10
  8. 8.88 + ? = 100
  9. 9.77 + ? = 100
  10. 10.61 + ? = 100
  11. 11.23 + ? = 100
  12. 12.35 + ? = 100
  13. 13.7 + ? = 10
  14. 14.6 + ? = 10
  15. 15.17 + ? = 100
  16. 16.54 + ? = 100
  17. 17.30 + ? = 100
  18. 18.43 + ? = 100
  19. 19.2 + ? = 10
  20. 20.5 + ? = 10
  21. 21.3 + ? = 10
  22. 22.46 + ? = 100
  23. 23.40 + ? = 100
  24. 24.12 + ? = 100
  25. 25.27 + ? = 100
  26. 26.50 + ? = 100
  27. 27.63 + ? = 100
  28. 28.8 + ? = 10
  29. 29.44 + ? = 100
  30. 30.15 + ? = 100
  31. 31.14 + ? = 100
  32. 32.11 + ? = 100
  33. 33.79 + ? = 100
  34. 34.68 + ? = 100
  35. 35.47 + ? = 100
  36. 36.28 + ? = 100
  37. 37.75 + ? = 100
  38. 38.21 + ? = 100
  39. 39.62 + ? = 100
  40. 40.25 + ? = 100

Answer key

  1. 78
  2. 1
  3. 35
  4. 68
  5. 27
  6. 9
  7. 6
  8. 12
  9. 23
  10. 39
  11. 77
  12. 65
  13. 3
  14. 4
  15. 83
  16. 46
  17. 70
  18. 57
  19. 8
  20. 5
  21. 7
  22. 54
  23. 60
  24. 88
  25. 73
  26. 50
  27. 37
  28. 2
  29. 56
  30. 85
  31. 86
  32. 89
  33. 21
  34. 32
  35. 53
  36. 72
  37. 25
  38. 79
  39. 38
  40. 75

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