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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 667 · 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. 1.18 + ? = 100
  2. 2.40 + ? = 100
  3. 3.42 + ? = 100
  4. 4.67 + ? = 100
  5. 5.41 + ? = 100
  6. 6.37 + ? = 100
  7. 7.3 + ? = 10
  8. 8.2 + ? = 10
  9. 9.5 + ? = 10
  10. 10.9 + ? = 10
  11. 11.34 + ? = 100
  12. 12.4 + ? = 10
  13. 13.25 + ? = 100
  14. 14.47 + ? = 100
  15. 15.19 + ? = 100
  16. 16.75 + ? = 100
  17. 17.27 + ? = 100
  18. 18.7 + ? = 10
  19. 19.71 + ? = 100
  20. 20.1 + ? = 10
  21. 21.6 + ? = 10
  22. 22.8 + ? = 10
  23. 23.23 + ? = 100
  24. 24.15 + ? = 100
  25. 25.74 + ? = 100
  26. 26.68 + ? = 100
  27. 27.33 + ? = 100
  28. 28.79 + ? = 100
  29. 29.54 + ? = 100
  30. 30.22 + ? = 100
  31. 31.80 + ? = 100
  32. 32.38 + ? = 100
  33. 33.30 + ? = 100
  34. 34.20 + ? = 100
  35. 35.77 + ? = 100
  36. 36.60 + ? = 100
  37. 37.59 + ? = 100
  38. 38.85 + ? = 100
  39. 39.45 + ? = 100
  40. 40.57 + ? = 100

Answer key

  1. 82
  2. 60
  3. 58
  4. 33
  5. 59
  6. 63
  7. 7
  8. 8
  9. 5
  10. 1
  11. 66
  12. 6
  13. 75
  14. 53
  15. 81
  16. 25
  17. 73
  18. 3
  19. 29
  20. 9
  21. 4
  22. 2
  23. 77
  24. 85
  25. 26
  26. 32
  27. 67
  28. 21
  29. 46
  30. 78
  31. 20
  32. 62
  33. 70
  34. 80
  35. 23
  36. 40
  37. 41
  38. 15
  39. 55
  40. 43

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