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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 416 · 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. 1.32 + ? = 100
  2. 2.5 + ? = 10
  3. 3.9 + ? = 10
  4. 4.4 + ? = 10
  5. 5.3 + ? = 10
  6. 6.48 + ? = 100
  7. 7.33 + ? = 100
  8. 8.71 + ? = 100
  9. 9.60 + ? = 100
  10. 10.56 + ? = 100
  11. 11.70 + ? = 100
  12. 12.67 + ? = 100
  13. 13.17 + ? = 100
  14. 14.87 + ? = 100
  15. 15.1 + ? = 10
  16. 16.8 + ? = 10
  17. 17.76 + ? = 100
  18. 18.45 + ? = 100
  19. 19.53 + ? = 100
  20. 20.11 + ? = 100
  21. 21.78 + ? = 100
  22. 22.68 + ? = 100
  23. 23.57 + ? = 100
  24. 24.83 + ? = 100
  25. 25.7 + ? = 10
  26. 26.19 + ? = 100
  27. 27.41 + ? = 100
  28. 28.6 + ? = 10
  29. 29.30 + ? = 100
  30. 30.2 + ? = 10
  31. 31.69 + ? = 100
  32. 32.16 + ? = 100
  33. 33.24 + ? = 100
  34. 34.42 + ? = 100
  35. 35.25 + ? = 100
  36. 36.74 + ? = 100
  37. 37.44 + ? = 100
  38. 38.36 + ? = 100
  39. 39.89 + ? = 100
  40. 40.58 + ? = 100

Answer key

  1. 68
  2. 5
  3. 1
  4. 6
  5. 7
  6. 52
  7. 67
  8. 29
  9. 40
  10. 44
  11. 30
  12. 33
  13. 83
  14. 13
  15. 9
  16. 2
  17. 24
  18. 55
  19. 47
  20. 89
  21. 22
  22. 32
  23. 43
  24. 17
  25. 3
  26. 81
  27. 59
  28. 4
  29. 70
  30. 8
  31. 31
  32. 84
  33. 76
  34. 58
  35. 75
  36. 26
  37. 56
  38. 64
  39. 11
  40. 42

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