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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 568 · 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. 1.61 + ? = 100
  2. 2.8 + ? = 10
  3. 3.22 + ? = 100
  4. 4.9 + ? = 10
  5. 5.2 + ? = 10
  6. 6.5 + ? = 10
  7. 7.81 + ? = 100
  8. 8.4 + ? = 10
  9. 9.44 + ? = 100
  10. 10.40 + ? = 100
  11. 11.46 + ? = 100
  12. 12.6 + ? = 10
  13. 13.12 + ? = 100
  14. 14.3 + ? = 10
  15. 15.82 + ? = 100
  16. 16.59 + ? = 100
  17. 17.1 + ? = 10
  18. 18.79 + ? = 100
  19. 19.86 + ? = 100
  20. 20.62 + ? = 100
  21. 21.7 + ? = 10
  22. 22.15 + ? = 100
  23. 23.21 + ? = 100
  24. 24.28 + ? = 100
  25. 25.38 + ? = 100
  26. 26.87 + ? = 100
  27. 27.67 + ? = 100
  28. 28.84 + ? = 100
  29. 29.42 + ? = 100
  30. 30.55 + ? = 100
  31. 31.30 + ? = 100
  32. 32.47 + ? = 100
  33. 33.16 + ? = 100
  34. 34.83 + ? = 100
  35. 35.24 + ? = 100
  36. 36.31 + ? = 100
  37. 37.74 + ? = 100
  38. 38.27 + ? = 100
  39. 39.43 + ? = 100
  40. 40.45 + ? = 100

Answer key

  1. 39
  2. 2
  3. 78
  4. 1
  5. 8
  6. 5
  7. 19
  8. 6
  9. 56
  10. 60
  11. 54
  12. 4
  13. 88
  14. 7
  15. 18
  16. 41
  17. 9
  18. 21
  19. 14
  20. 38
  21. 3
  22. 85
  23. 79
  24. 72
  25. 62
  26. 13
  27. 33
  28. 16
  29. 58
  30. 45
  31. 70
  32. 53
  33. 84
  34. 17
  35. 76
  36. 69
  37. 26
  38. 73
  39. 57
  40. 55

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