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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 223 · 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. 1.2 + ? = 10
  2. 2.33 + ? = 100
  3. 3.1 + ? = 10
  4. 4.4 + ? = 10
  5. 5.27 + ? = 100
  6. 6.67 + ? = 100
  7. 7.14 + ? = 100
  8. 8.60 + ? = 100
  9. 9.53 + ? = 100
  10. 10.23 + ? = 100
  11. 11.74 + ? = 100
  12. 12.6 + ? = 10
  13. 13.37 + ? = 100
  14. 14.48 + ? = 100
  15. 15.9 + ? = 10
  16. 16.5 + ? = 10
  17. 17.65 + ? = 100
  18. 18.69 + ? = 100
  19. 19.39 + ? = 100
  20. 20.18 + ? = 100
  21. 21.82 + ? = 100
  22. 22.73 + ? = 100
  23. 23.64 + ? = 100
  24. 24.7 + ? = 10
  25. 25.72 + ? = 100
  26. 26.26 + ? = 100
  27. 27.3 + ? = 10
  28. 28.30 + ? = 100
  29. 29.17 + ? = 100
  30. 30.57 + ? = 100
  31. 31.29 + ? = 100
  32. 32.77 + ? = 100
  33. 33.78 + ? = 100
  34. 34.15 + ? = 100
  35. 35.32 + ? = 100
  36. 36.89 + ? = 100
  37. 37.8 + ? = 10
  38. 38.12 + ? = 100
  39. 39.50 + ? = 100
  40. 40.84 + ? = 100

Answer key

  1. 8
  2. 67
  3. 9
  4. 6
  5. 73
  6. 33
  7. 86
  8. 40
  9. 47
  10. 77
  11. 26
  12. 4
  13. 63
  14. 52
  15. 1
  16. 5
  17. 35
  18. 31
  19. 61
  20. 82
  21. 18
  22. 27
  23. 36
  24. 3
  25. 28
  26. 74
  27. 7
  28. 70
  29. 83
  30. 43
  31. 71
  32. 23
  33. 22
  34. 85
  35. 68
  36. 11
  37. 2
  38. 88
  39. 50
  40. 16

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