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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 225 · 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. 2.31 + ? = 100
  3. 3.54 + ? = 100
  4. 4.82 + ? = 100
  5. 5.3 + ? = 10
  6. 6.30 + ? = 100
  7. 7.56 + ? = 100
  8. 8.15 + ? = 100
  9. 9.9 + ? = 10
  10. 10.17 + ? = 100
  11. 11.50 + ? = 100
  12. 12.23 + ? = 100
  13. 13.81 + ? = 100
  14. 14.8 + ? = 10
  15. 15.26 + ? = 100
  16. 16.69 + ? = 100
  17. 17.28 + ? = 100
  18. 18.21 + ? = 100
  19. 19.63 + ? = 100
  20. 20.1 + ? = 10
  21. 21.6 + ? = 10
  22. 22.79 + ? = 100
  23. 23.7 + ? = 10
  24. 24.75 + ? = 100
  25. 25.43 + ? = 100
  26. 26.40 + ? = 100
  27. 27.60 + ? = 100
  28. 28.14 + ? = 100
  29. 29.36 + ? = 100
  30. 30.58 + ? = 100
  31. 31.12 + ? = 100
  32. 32.77 + ? = 100
  33. 33.4 + ? = 10
  34. 34.76 + ? = 100
  35. 35.42 + ? = 100
  36. 36.84 + ? = 100
  37. 37.88 + ? = 100
  38. 38.47 + ? = 100
  39. 39.22 + ? = 100
  40. 40.5 + ? = 10

Answer key

  1. 8
  2. 69
  3. 46
  4. 18
  5. 7
  6. 70
  7. 44
  8. 85
  9. 1
  10. 83
  11. 50
  12. 77
  13. 19
  14. 2
  15. 74
  16. 31
  17. 72
  18. 79
  19. 37
  20. 9
  21. 4
  22. 21
  23. 3
  24. 25
  25. 57
  26. 60
  27. 40
  28. 86
  29. 64
  30. 42
  31. 88
  32. 23
  33. 6
  34. 24
  35. 58
  36. 16
  37. 12
  38. 53
  39. 78
  40. 5

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