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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 267 · 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. 1.8 + ? = 10
  2. 2.56 + ? = 100
  3. 3.6 + ? = 10
  4. 4.9 + ? = 10
  5. 5.5 + ? = 10
  6. 6.89 + ? = 100
  7. 7.66 + ? = 100
  8. 8.38 + ? = 100
  9. 9.60 + ? = 100
  10. 10.1 + ? = 10
  11. 11.4 + ? = 10
  12. 12.34 + ? = 100
  13. 13.48 + ? = 100
  14. 14.7 + ? = 10
  15. 15.85 + ? = 100
  16. 16.41 + ? = 100
  17. 17.83 + ? = 100
  18. 18.65 + ? = 100
  19. 19.11 + ? = 100
  20. 20.57 + ? = 100
  21. 21.3 + ? = 10
  22. 22.46 + ? = 100
  23. 23.53 + ? = 100
  24. 24.77 + ? = 100
  25. 25.86 + ? = 100
  26. 26.63 + ? = 100
  27. 27.58 + ? = 100
  28. 28.28 + ? = 100
  29. 29.36 + ? = 100
  30. 30.2 + ? = 10
  31. 31.87 + ? = 100
  32. 32.44 + ? = 100
  33. 33.59 + ? = 100
  34. 34.12 + ? = 100
  35. 35.20 + ? = 100
  36. 36.84 + ? = 100
  37. 37.76 + ? = 100
  38. 38.71 + ? = 100
  39. 39.24 + ? = 100
  40. 40.37 + ? = 100

Answer key

  1. 2
  2. 44
  3. 4
  4. 1
  5. 5
  6. 11
  7. 34
  8. 62
  9. 40
  10. 9
  11. 6
  12. 66
  13. 52
  14. 3
  15. 15
  16. 59
  17. 17
  18. 35
  19. 89
  20. 43
  21. 7
  22. 54
  23. 47
  24. 23
  25. 14
  26. 37
  27. 42
  28. 72
  29. 64
  30. 8
  31. 13
  32. 56
  33. 41
  34. 88
  35. 80
  36. 16
  37. 24
  38. 29
  39. 76
  40. 63

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