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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 529 · 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. 1.24 + ? = 100
  2. 2.7 + ? = 10
  3. 3.29 + ? = 100
  4. 4.2 + ? = 10
  5. 5.5 + ? = 10
  6. 6.6 + ? = 10
  7. 7.3 + ? = 10
  8. 8.64 + ? = 100
  9. 9.74 + ? = 100
  10. 10.9 + ? = 10
  11. 11.76 + ? = 100
  12. 12.4 + ? = 10
  13. 13.48 + ? = 100
  14. 14.21 + ? = 100
  15. 15.75 + ? = 100
  16. 16.39 + ? = 100
  17. 17.60 + ? = 100
  18. 18.13 + ? = 100
  19. 19.44 + ? = 100
  20. 20.38 + ? = 100
  21. 21.46 + ? = 100
  22. 22.78 + ? = 100
  23. 23.73 + ? = 100
  24. 24.50 + ? = 100
  25. 25.86 + ? = 100
  26. 26.19 + ? = 100
  27. 27.87 + ? = 100
  28. 28.27 + ? = 100
  29. 29.12 + ? = 100
  30. 30.41 + ? = 100
  31. 31.53 + ? = 100
  32. 32.32 + ? = 100
  33. 33.1 + ? = 10
  34. 34.71 + ? = 100
  35. 35.68 + ? = 100
  36. 36.20 + ? = 100
  37. 37.25 + ? = 100
  38. 38.51 + ? = 100
  39. 39.15 + ? = 100
  40. 40.28 + ? = 100

Answer key

  1. 76
  2. 3
  3. 71
  4. 8
  5. 5
  6. 4
  7. 7
  8. 36
  9. 26
  10. 1
  11. 24
  12. 6
  13. 52
  14. 79
  15. 25
  16. 61
  17. 40
  18. 87
  19. 56
  20. 62
  21. 54
  22. 22
  23. 27
  24. 50
  25. 14
  26. 81
  27. 13
  28. 73
  29. 88
  30. 59
  31. 47
  32. 68
  33. 9
  34. 29
  35. 32
  36. 80
  37. 75
  38. 49
  39. 85
  40. 72

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