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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 208 · 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. 1.3 + ? = 10
  2. 2.8 + ? = 10
  3. 3.30 + ? = 100
  4. 4.26 + ? = 100
  5. 5.9 + ? = 10
  6. 6.1 + ? = 10
  7. 7.53 + ? = 100
  8. 8.64 + ? = 100
  9. 9.7 + ? = 10
  10. 10.24 + ? = 100
  11. 11.45 + ? = 100
  12. 12.20 + ? = 100
  13. 13.50 + ? = 100
  14. 14.86 + ? = 100
  15. 15.4 + ? = 10
  16. 16.33 + ? = 100
  17. 17.19 + ? = 100
  18. 18.72 + ? = 100
  19. 19.49 + ? = 100
  20. 20.89 + ? = 100
  21. 21.57 + ? = 100
  22. 22.79 + ? = 100
  23. 23.36 + ? = 100
  24. 24.62 + ? = 100
  25. 25.87 + ? = 100
  26. 26.55 + ? = 100
  27. 27.6 + ? = 10
  28. 28.75 + ? = 100
  29. 29.56 + ? = 100
  30. 30.76 + ? = 100
  31. 31.59 + ? = 100
  32. 32.29 + ? = 100
  33. 33.32 + ? = 100
  34. 34.68 + ? = 100
  35. 35.15 + ? = 100
  36. 36.83 + ? = 100
  37. 37.2 + ? = 10
  38. 38.27 + ? = 100
  39. 39.12 + ? = 100
  40. 40.71 + ? = 100

Answer key

  1. 7
  2. 2
  3. 70
  4. 74
  5. 1
  6. 9
  7. 47
  8. 36
  9. 3
  10. 76
  11. 55
  12. 80
  13. 50
  14. 14
  15. 6
  16. 67
  17. 81
  18. 28
  19. 51
  20. 11
  21. 43
  22. 21
  23. 64
  24. 38
  25. 13
  26. 45
  27. 4
  28. 25
  29. 44
  30. 24
  31. 41
  32. 71
  33. 68
  34. 32
  35. 85
  36. 17
  37. 8
  38. 73
  39. 88
  40. 29

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