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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 190 · 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. 1.56 + ? = 100
  2. 2.26 + ? = 100
  3. 3.65 + ? = 100
  4. 4.66 + ? = 100
  5. 5.1 + ? = 10
  6. 6.24 + ? = 100
  7. 7.14 + ? = 100
  8. 8.2 + ? = 10
  9. 9.5 + ? = 10
  10. 10.8 + ? = 10
  11. 11.32 + ? = 100
  12. 12.22 + ? = 100
  13. 13.18 + ? = 100
  14. 14.7 + ? = 10
  15. 15.31 + ? = 100
  16. 16.74 + ? = 100
  17. 17.67 + ? = 100
  18. 18.62 + ? = 100
  19. 19.28 + ? = 100
  20. 20.4 + ? = 10
  21. 21.60 + ? = 100
  22. 22.19 + ? = 100
  23. 23.85 + ? = 100
  24. 24.3 + ? = 10
  25. 25.9 + ? = 10
  26. 26.25 + ? = 100
  27. 27.13 + ? = 100
  28. 28.83 + ? = 100
  29. 29.41 + ? = 100
  30. 30.54 + ? = 100
  31. 31.6 + ? = 10
  32. 32.86 + ? = 100
  33. 33.79 + ? = 100
  34. 34.16 + ? = 100
  35. 35.84 + ? = 100
  36. 36.63 + ? = 100
  37. 37.88 + ? = 100
  38. 38.30 + ? = 100
  39. 39.29 + ? = 100
  40. 40.45 + ? = 100

Answer key

  1. 44
  2. 74
  3. 35
  4. 34
  5. 9
  6. 76
  7. 86
  8. 8
  9. 5
  10. 2
  11. 68
  12. 78
  13. 82
  14. 3
  15. 69
  16. 26
  17. 33
  18. 38
  19. 72
  20. 6
  21. 40
  22. 81
  23. 15
  24. 7
  25. 1
  26. 75
  27. 87
  28. 17
  29. 59
  30. 46
  31. 4
  32. 14
  33. 21
  34. 84
  35. 16
  36. 37
  37. 12
  38. 70
  39. 71
  40. 55

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