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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 289 · 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. 1.1 + ? = 10
  2. 2.20 + ? = 100
  3. 3.86 + ? = 100
  4. 4.35 + ? = 100
  5. 5.7 + ? = 10
  6. 6.58 + ? = 100
  7. 7.4 + ? = 10
  8. 8.50 + ? = 100
  9. 9.83 + ? = 100
  10. 10.23 + ? = 100
  11. 11.8 + ? = 10
  12. 12.57 + ? = 100
  13. 13.49 + ? = 100
  14. 14.67 + ? = 100
  15. 15.6 + ? = 10
  16. 16.2 + ? = 10
  17. 17.15 + ? = 100
  18. 18.5 + ? = 10
  19. 19.9 + ? = 10
  20. 20.76 + ? = 100
  21. 21.13 + ? = 100
  22. 22.71 + ? = 100
  23. 23.72 + ? = 100
  24. 24.3 + ? = 10
  25. 25.44 + ? = 100
  26. 26.56 + ? = 100
  27. 27.66 + ? = 100
  28. 28.40 + ? = 100
  29. 29.25 + ? = 100
  30. 30.24 + ? = 100
  31. 31.26 + ? = 100
  32. 32.16 + ? = 100
  33. 33.84 + ? = 100
  34. 34.27 + ? = 100
  35. 35.37 + ? = 100
  36. 36.46 + ? = 100
  37. 37.42 + ? = 100
  38. 38.73 + ? = 100
  39. 39.22 + ? = 100
  40. 40.14 + ? = 100

Answer key

  1. 9
  2. 80
  3. 14
  4. 65
  5. 3
  6. 42
  7. 6
  8. 50
  9. 17
  10. 77
  11. 2
  12. 43
  13. 51
  14. 33
  15. 4
  16. 8
  17. 85
  18. 5
  19. 1
  20. 24
  21. 87
  22. 29
  23. 28
  24. 7
  25. 56
  26. 44
  27. 34
  28. 60
  29. 75
  30. 76
  31. 74
  32. 84
  33. 16
  34. 73
  35. 63
  36. 54
  37. 58
  38. 27
  39. 78
  40. 86

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