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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 610 · 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. 1.7 + ? = 10
  2. 2.3 + ? = 10
  3. 3.6 + ? = 10
  4. 4.15 + ? = 100
  5. 5.41 + ? = 100
  6. 6.2 + ? = 10
  7. 7.16 + ? = 100
  8. 8.80 + ? = 100
  9. 9.1 + ? = 10
  10. 10.44 + ? = 100
  11. 11.59 + ? = 100
  12. 12.9 + ? = 10
  13. 13.17 + ? = 100
  14. 14.5 + ? = 10
  15. 15.38 + ? = 100
  16. 16.4 + ? = 10
  17. 17.29 + ? = 100
  18. 18.8 + ? = 10
  19. 19.47 + ? = 100
  20. 20.48 + ? = 100
  21. 21.40 + ? = 100
  22. 22.45 + ? = 100
  23. 23.72 + ? = 100
  24. 24.25 + ? = 100
  25. 25.26 + ? = 100
  26. 26.22 + ? = 100
  27. 27.43 + ? = 100
  28. 28.31 + ? = 100
  29. 29.13 + ? = 100
  30. 30.53 + ? = 100
  31. 31.24 + ? = 100
  32. 32.36 + ? = 100
  33. 33.74 + ? = 100
  34. 34.63 + ? = 100
  35. 35.66 + ? = 100
  36. 36.39 + ? = 100
  37. 37.54 + ? = 100
  38. 38.84 + ? = 100
  39. 39.28 + ? = 100
  40. 40.33 + ? = 100

Answer key

  1. 3
  2. 7
  3. 4
  4. 85
  5. 59
  6. 8
  7. 84
  8. 20
  9. 9
  10. 56
  11. 41
  12. 1
  13. 83
  14. 5
  15. 62
  16. 6
  17. 71
  18. 2
  19. 53
  20. 52
  21. 60
  22. 55
  23. 28
  24. 75
  25. 74
  26. 78
  27. 57
  28. 69
  29. 87
  30. 47
  31. 76
  32. 64
  33. 26
  34. 37
  35. 34
  36. 61
  37. 46
  38. 16
  39. 72
  40. 67

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