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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 665 · 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. 1.26 + ? = 100
  2. 2.8 + ? = 10
  3. 3.82 + ? = 100
  4. 4.6 + ? = 10
  5. 5.5 + ? = 10
  6. 6.7 + ? = 10
  7. 7.3 + ? = 10
  8. 8.83 + ? = 100
  9. 9.4 + ? = 10
  10. 10.27 + ? = 100
  11. 11.2 + ? = 10
  12. 12.41 + ? = 100
  13. 13.80 + ? = 100
  14. 14.22 + ? = 100
  15. 15.85 + ? = 100
  16. 16.1 + ? = 10
  17. 17.53 + ? = 100
  18. 18.30 + ? = 100
  19. 19.72 + ? = 100
  20. 20.39 + ? = 100
  21. 21.9 + ? = 10
  22. 22.28 + ? = 100
  23. 23.33 + ? = 100
  24. 24.45 + ? = 100
  25. 25.49 + ? = 100
  26. 26.81 + ? = 100
  27. 27.38 + ? = 100
  28. 28.34 + ? = 100
  29. 29.46 + ? = 100
  30. 30.12 + ? = 100
  31. 31.56 + ? = 100
  32. 32.44 + ? = 100
  33. 33.42 + ? = 100
  34. 34.79 + ? = 100
  35. 35.29 + ? = 100
  36. 36.15 + ? = 100
  37. 37.35 + ? = 100
  38. 38.70 + ? = 100
  39. 39.25 + ? = 100
  40. 40.17 + ? = 100

Answer key

  1. 74
  2. 2
  3. 18
  4. 4
  5. 5
  6. 3
  7. 7
  8. 17
  9. 6
  10. 73
  11. 8
  12. 59
  13. 20
  14. 78
  15. 15
  16. 9
  17. 47
  18. 70
  19. 28
  20. 61
  21. 1
  22. 72
  23. 67
  24. 55
  25. 51
  26. 19
  27. 62
  28. 66
  29. 54
  30. 88
  31. 44
  32. 56
  33. 58
  34. 21
  35. 71
  36. 85
  37. 65
  38. 30
  39. 75
  40. 83

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