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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 605 · 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. 1.8 + ? = 10
  2. 2.12 + ? = 100
  3. 3.2 + ? = 10
  4. 4.53 + ? = 100
  5. 5.6 + ? = 10
  6. 6.17 + ? = 100
  7. 7.14 + ? = 100
  8. 8.1 + ? = 10
  9. 9.44 + ? = 100
  10. 10.85 + ? = 100
  11. 11.38 + ? = 100
  12. 12.83 + ? = 100
  13. 13.59 + ? = 100
  14. 14.37 + ? = 100
  15. 15.30 + ? = 100
  16. 16.58 + ? = 100
  17. 17.3 + ? = 10
  18. 18.4 + ? = 10
  19. 19.19 + ? = 100
  20. 20.9 + ? = 10
  21. 21.65 + ? = 100
  22. 22.35 + ? = 100
  23. 23.50 + ? = 100
  24. 24.45 + ? = 100
  25. 25.73 + ? = 100
  26. 26.29 + ? = 100
  27. 27.5 + ? = 10
  28. 28.7 + ? = 10
  29. 29.23 + ? = 100
  30. 30.39 + ? = 100
  31. 31.24 + ? = 100
  32. 32.74 + ? = 100
  33. 33.87 + ? = 100
  34. 34.34 + ? = 100
  35. 35.20 + ? = 100
  36. 36.25 + ? = 100
  37. 37.76 + ? = 100
  38. 38.66 + ? = 100
  39. 39.46 + ? = 100
  40. 40.42 + ? = 100

Answer key

  1. 2
  2. 88
  3. 8
  4. 47
  5. 4
  6. 83
  7. 86
  8. 9
  9. 56
  10. 15
  11. 62
  12. 17
  13. 41
  14. 63
  15. 70
  16. 42
  17. 7
  18. 6
  19. 81
  20. 1
  21. 35
  22. 65
  23. 50
  24. 55
  25. 27
  26. 71
  27. 5
  28. 3
  29. 77
  30. 61
  31. 76
  32. 26
  33. 13
  34. 66
  35. 80
  36. 75
  37. 24
  38. 34
  39. 54
  40. 58

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