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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 699 · 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. 1.41 + ? = 100
  2. 2.7 + ? = 10
  3. 3.4 + ? = 10
  4. 4.3 + ? = 10
  5. 5.14 + ? = 100
  6. 6.50 + ? = 100
  7. 7.5 + ? = 10
  8. 8.16 + ? = 100
  9. 9.9 + ? = 10
  10. 10.86 + ? = 100
  11. 11.8 + ? = 10
  12. 12.47 + ? = 100
  13. 13.24 + ? = 100
  14. 14.67 + ? = 100
  15. 15.55 + ? = 100
  16. 16.35 + ? = 100
  17. 17.43 + ? = 100
  18. 18.85 + ? = 100
  19. 19.64 + ? = 100
  20. 20.48 + ? = 100
  21. 21.6 + ? = 10
  22. 22.1 + ? = 10
  23. 23.22 + ? = 100
  24. 24.66 + ? = 100
  25. 25.20 + ? = 100
  26. 26.36 + ? = 100
  27. 27.68 + ? = 100
  28. 28.15 + ? = 100
  29. 29.27 + ? = 100
  30. 30.57 + ? = 100
  31. 31.46 + ? = 100
  32. 32.51 + ? = 100
  33. 33.37 + ? = 100
  34. 34.83 + ? = 100
  35. 35.28 + ? = 100
  36. 36.32 + ? = 100
  37. 37.18 + ? = 100
  38. 38.79 + ? = 100
  39. 39.49 + ? = 100
  40. 40.30 + ? = 100

Answer key

  1. 59
  2. 3
  3. 6
  4. 7
  5. 86
  6. 50
  7. 5
  8. 84
  9. 1
  10. 14
  11. 2
  12. 53
  13. 76
  14. 33
  15. 45
  16. 65
  17. 57
  18. 15
  19. 36
  20. 52
  21. 4
  22. 9
  23. 78
  24. 34
  25. 80
  26. 64
  27. 32
  28. 85
  29. 73
  30. 43
  31. 54
  32. 49
  33. 63
  34. 17
  35. 72
  36. 68
  37. 82
  38. 21
  39. 51
  40. 70

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