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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 458 · 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. 1.34 + ? = 100
  2. 2.64 + ? = 100
  3. 3.30 + ? = 100
  4. 4.9 + ? = 10
  5. 5.74 + ? = 100
  6. 6.5 + ? = 10
  7. 7.18 + ? = 100
  8. 8.17 + ? = 100
  9. 9.71 + ? = 100
  10. 10.3 + ? = 10
  11. 11.48 + ? = 100
  12. 12.22 + ? = 100
  13. 13.2 + ? = 10
  14. 14.21 + ? = 100
  15. 15.31 + ? = 100
  16. 16.24 + ? = 100
  17. 17.49 + ? = 100
  18. 18.26 + ? = 100
  19. 19.53 + ? = 100
  20. 20.1 + ? = 10
  21. 21.8 + ? = 10
  22. 22.7 + ? = 10
  23. 23.12 + ? = 100
  24. 24.35 + ? = 100
  25. 25.25 + ? = 100
  26. 26.55 + ? = 100
  27. 27.50 + ? = 100
  28. 28.27 + ? = 100
  29. 29.19 + ? = 100
  30. 30.69 + ? = 100
  31. 31.29 + ? = 100
  32. 32.4 + ? = 10
  33. 33.46 + ? = 100
  34. 34.42 + ? = 100
  35. 35.6 + ? = 10
  36. 36.47 + ? = 100
  37. 37.43 + ? = 100
  38. 38.44 + ? = 100
  39. 39.81 + ? = 100
  40. 40.70 + ? = 100

Answer key

  1. 66
  2. 36
  3. 70
  4. 1
  5. 26
  6. 5
  7. 82
  8. 83
  9. 29
  10. 7
  11. 52
  12. 78
  13. 8
  14. 79
  15. 69
  16. 76
  17. 51
  18. 74
  19. 47
  20. 9
  21. 2
  22. 3
  23. 88
  24. 65
  25. 75
  26. 45
  27. 50
  28. 73
  29. 81
  30. 31
  31. 71
  32. 6
  33. 54
  34. 58
  35. 4
  36. 53
  37. 57
  38. 56
  39. 19
  40. 30

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