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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 489 · 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. 1.86 + ? = 100
  2. 2.6 + ? = 10
  3. 3.32 + ? = 100
  4. 4.9 + ? = 10
  5. 5.49 + ? = 100
  6. 6.58 + ? = 100
  7. 7.5 + ? = 10
  8. 8.78 + ? = 100
  9. 9.4 + ? = 10
  10. 10.21 + ? = 100
  11. 11.3 + ? = 10
  12. 12.43 + ? = 100
  13. 13.8 + ? = 10
  14. 14.2 + ? = 10
  15. 15.50 + ? = 100
  16. 16.1 + ? = 10
  17. 17.74 + ? = 100
  18. 18.27 + ? = 100
  19. 19.47 + ? = 100
  20. 20.7 + ? = 10
  21. 21.53 + ? = 100
  22. 22.17 + ? = 100
  23. 23.24 + ? = 100
  24. 24.18 + ? = 100
  25. 25.55 + ? = 100
  26. 26.28 + ? = 100
  27. 27.85 + ? = 100
  28. 28.26 + ? = 100
  29. 29.69 + ? = 100
  30. 30.13 + ? = 100
  31. 31.89 + ? = 100
  32. 32.12 + ? = 100
  33. 33.83 + ? = 100
  34. 34.73 + ? = 100
  35. 35.84 + ? = 100
  36. 36.76 + ? = 100
  37. 37.33 + ? = 100
  38. 38.31 + ? = 100
  39. 39.81 + ? = 100
  40. 40.40 + ? = 100

Answer key

  1. 14
  2. 4
  3. 68
  4. 1
  5. 51
  6. 42
  7. 5
  8. 22
  9. 6
  10. 79
  11. 7
  12. 57
  13. 2
  14. 8
  15. 50
  16. 9
  17. 26
  18. 73
  19. 53
  20. 3
  21. 47
  22. 83
  23. 76
  24. 82
  25. 45
  26. 72
  27. 15
  28. 74
  29. 31
  30. 87
  31. 11
  32. 88
  33. 17
  34. 27
  35. 16
  36. 24
  37. 67
  38. 69
  39. 19
  40. 60

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