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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 284 · 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. 1.69 + ? = 100
  2. 2.24 + ? = 100
  3. 3.56 + ? = 100
  4. 4.5 + ? = 10
  5. 5.76 + ? = 100
  6. 6.2 + ? = 10
  7. 7.22 + ? = 100
  8. 8.21 + ? = 100
  9. 9.7 + ? = 10
  10. 10.12 + ? = 100
  11. 11.88 + ? = 100
  12. 12.60 + ? = 100
  13. 13.18 + ? = 100
  14. 14.32 + ? = 100
  15. 15.1 + ? = 10
  16. 16.6 + ? = 10
  17. 17.4 + ? = 10
  18. 18.3 + ? = 10
  19. 19.9 + ? = 10
  20. 20.37 + ? = 100
  21. 21.89 + ? = 100
  22. 22.47 + ? = 100
  23. 23.52 + ? = 100
  24. 24.70 + ? = 100
  25. 25.53 + ? = 100
  26. 26.85 + ? = 100
  27. 27.34 + ? = 100
  28. 28.71 + ? = 100
  29. 29.48 + ? = 100
  30. 30.73 + ? = 100
  31. 31.41 + ? = 100
  32. 32.11 + ? = 100
  33. 33.56 + ? = 100
  34. 34.46 + ? = 100
  35. 35.8 + ? = 10
  36. 36.54 + ? = 100
  37. 37.87 + ? = 100
  38. 38.72 + ? = 100
  39. 39.44 + ? = 100
  40. 40.42 + ? = 100

Answer key

  1. 31
  2. 76
  3. 44
  4. 5
  5. 24
  6. 8
  7. 78
  8. 79
  9. 3
  10. 88
  11. 12
  12. 40
  13. 82
  14. 68
  15. 9
  16. 4
  17. 6
  18. 7
  19. 1
  20. 63
  21. 11
  22. 53
  23. 48
  24. 30
  25. 47
  26. 15
  27. 66
  28. 29
  29. 52
  30. 27
  31. 59
  32. 89
  33. 44
  34. 54
  35. 2
  36. 46
  37. 13
  38. 28
  39. 56
  40. 58

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