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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 402 · 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. 1.40 + ? = 100
  2. 2.9 + ? = 10
  3. 3.14 + ? = 100
  4. 4.4 + ? = 10
  5. 5.6 + ? = 10
  6. 6.46 + ? = 100
  7. 7.50 + ? = 100
  8. 8.7 + ? = 10
  9. 9.28 + ? = 100
  10. 10.30 + ? = 100
  11. 11.1 + ? = 10
  12. 12.22 + ? = 100
  13. 13.5 + ? = 10
  14. 14.44 + ? = 100
  15. 15.71 + ? = 100
  16. 16.59 + ? = 100
  17. 17.64 + ? = 100
  18. 18.77 + ? = 100
  19. 19.2 + ? = 10
  20. 20.8 + ? = 10
  21. 21.21 + ? = 100
  22. 22.11 + ? = 100
  23. 23.62 + ? = 100
  24. 24.13 + ? = 100
  25. 25.52 + ? = 100
  26. 26.34 + ? = 100
  27. 27.55 + ? = 100
  28. 28.87 + ? = 100
  29. 29.81 + ? = 100
  30. 30.73 + ? = 100
  31. 31.39 + ? = 100
  32. 32.85 + ? = 100
  33. 33.89 + ? = 100
  34. 34.69 + ? = 100
  35. 35.41 + ? = 100
  36. 36.15 + ? = 100
  37. 37.82 + ? = 100
  38. 38.18 + ? = 100
  39. 39.72 + ? = 100
  40. 40.84 + ? = 100

Answer key

  1. 60
  2. 1
  3. 86
  4. 6
  5. 4
  6. 54
  7. 50
  8. 3
  9. 72
  10. 70
  11. 9
  12. 78
  13. 5
  14. 56
  15. 29
  16. 41
  17. 36
  18. 23
  19. 8
  20. 2
  21. 79
  22. 89
  23. 38
  24. 87
  25. 48
  26. 66
  27. 45
  28. 13
  29. 19
  30. 27
  31. 61
  32. 15
  33. 11
  34. 31
  35. 59
  36. 85
  37. 18
  38. 82
  39. 28
  40. 16

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