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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 387 · 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. 1.15 + ? = 100
  2. 2.43 + ? = 100
  3. 3.26 + ? = 100
  4. 4.6 + ? = 10
  5. 5.2 + ? = 10
  6. 6.51 + ? = 100
  7. 7.4 + ? = 10
  8. 8.33 + ? = 100
  9. 9.52 + ? = 100
  10. 10.53 + ? = 100
  11. 11.18 + ? = 100
  12. 12.62 + ? = 100
  13. 13.8 + ? = 10
  14. 14.88 + ? = 100
  15. 15.70 + ? = 100
  16. 16.9 + ? = 10
  17. 17.25 + ? = 100
  18. 18.49 + ? = 100
  19. 19.47 + ? = 100
  20. 20.87 + ? = 100
  21. 21.20 + ? = 100
  22. 22.1 + ? = 10
  23. 23.59 + ? = 100
  24. 24.40 + ? = 100
  25. 25.12 + ? = 100
  26. 26.68 + ? = 100
  27. 27.56 + ? = 100
  28. 28.3 + ? = 10
  29. 29.38 + ? = 100
  30. 30.73 + ? = 100
  31. 31.72 + ? = 100
  32. 32.37 + ? = 100
  33. 33.23 + ? = 100
  34. 34.82 + ? = 100
  35. 35.5 + ? = 10
  36. 36.42 + ? = 100
  37. 37.45 + ? = 100
  38. 38.41 + ? = 100
  39. 39.71 + ? = 100
  40. 40.14 + ? = 100

Answer key

  1. 85
  2. 57
  3. 74
  4. 4
  5. 8
  6. 49
  7. 6
  8. 67
  9. 48
  10. 47
  11. 82
  12. 38
  13. 2
  14. 12
  15. 30
  16. 1
  17. 75
  18. 51
  19. 53
  20. 13
  21. 80
  22. 9
  23. 41
  24. 60
  25. 88
  26. 32
  27. 44
  28. 7
  29. 62
  30. 27
  31. 28
  32. 63
  33. 77
  34. 18
  35. 5
  36. 58
  37. 55
  38. 59
  39. 29
  40. 86

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