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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 795 · 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. 1.52 + ? = 100
  2. 2.4 + ? = 10
  3. 3.66 + ? = 100
  4. 4.24 + ? = 100
  5. 5.60 + ? = 100
  6. 6.3 + ? = 10
  7. 7.6 + ? = 10
  8. 8.17 + ? = 100
  9. 9.30 + ? = 100
  10. 10.45 + ? = 100
  11. 11.71 + ? = 100
  12. 12.56 + ? = 100
  13. 13.46 + ? = 100
  14. 14.69 + ? = 100
  15. 15.7 + ? = 10
  16. 16.1 + ? = 10
  17. 17.8 + ? = 10
  18. 18.36 + ? = 100
  19. 19.75 + ? = 100
  20. 20.74 + ? = 100
  21. 21.2 + ? = 10
  22. 22.41 + ? = 100
  23. 23.31 + ? = 100
  24. 24.50 + ? = 100
  25. 25.38 + ? = 100
  26. 26.39 + ? = 100
  27. 27.84 + ? = 100
  28. 28.15 + ? = 100
  29. 29.59 + ? = 100
  30. 30.5 + ? = 10
  31. 31.47 + ? = 100
  32. 32.88 + ? = 100
  33. 33.86 + ? = 100
  34. 34.44 + ? = 100
  35. 35.23 + ? = 100
  36. 36.19 + ? = 100
  37. 37.85 + ? = 100
  38. 38.9 + ? = 10
  39. 39.25 + ? = 100
  40. 40.72 + ? = 100

Answer key

  1. 48
  2. 6
  3. 34
  4. 76
  5. 40
  6. 7
  7. 4
  8. 83
  9. 70
  10. 55
  11. 29
  12. 44
  13. 54
  14. 31
  15. 3
  16. 9
  17. 2
  18. 64
  19. 25
  20. 26
  21. 8
  22. 59
  23. 69
  24. 50
  25. 62
  26. 61
  27. 16
  28. 85
  29. 41
  30. 5
  31. 53
  32. 12
  33. 14
  34. 56
  35. 77
  36. 81
  37. 15
  38. 1
  39. 75
  40. 28

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