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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 38 · 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. 3.64 + ? = 100
  4. 4.37 + ? = 100
  5. 5.5 + ? = 10
  6. 6.36 + ? = 100
  7. 7.26 + ? = 100
  8. 8.1 + ? = 10
  9. 9.3 + ? = 10
  10. 10.21 + ? = 100
  11. 11.76 + ? = 100
  12. 12.38 + ? = 100
  13. 13.8 + ? = 10
  14. 14.7 + ? = 10
  15. 15.6 + ? = 10
  16. 16.27 + ? = 100
  17. 17.85 + ? = 100
  18. 18.20 + ? = 100
  19. 19.67 + ? = 100
  20. 20.74 + ? = 100
  21. 21.71 + ? = 100
  22. 22.4 + ? = 10
  23. 23.39 + ? = 100
  24. 24.51 + ? = 100
  25. 25.49 + ? = 100
  26. 26.9 + ? = 10
  27. 27.18 + ? = 100
  28. 28.83 + ? = 100
  29. 29.17 + ? = 100
  30. 30.30 + ? = 100
  31. 31.89 + ? = 100
  32. 32.23 + ? = 100
  33. 33.58 + ? = 100
  34. 34.88 + ? = 100
  35. 35.15 + ? = 100
  36. 36.63 + ? = 100
  37. 37.65 + ? = 100
  38. 38.55 + ? = 100
  39. 39.56 + ? = 100
  40. 40.19 + ? = 100

Answer key

  1. 8
  2. 67
  3. 36
  4. 63
  5. 5
  6. 64
  7. 74
  8. 9
  9. 7
  10. 79
  11. 24
  12. 62
  13. 2
  14. 3
  15. 4
  16. 73
  17. 15
  18. 80
  19. 33
  20. 26
  21. 29
  22. 6
  23. 61
  24. 49
  25. 51
  26. 1
  27. 82
  28. 17
  29. 83
  30. 70
  31. 11
  32. 77
  33. 42
  34. 12
  35. 85
  36. 37
  37. 35
  38. 45
  39. 44
  40. 81

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