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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 611 · 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. 1.2 + ? = 10
  2. 2.19 + ? = 100
  3. 3.9 + ? = 10
  4. 4.38 + ? = 100
  5. 5.6 + ? = 10
  6. 6.39 + ? = 100
  7. 7.56 + ? = 100
  8. 8.73 + ? = 100
  9. 9.7 + ? = 10
  10. 10.16 + ? = 100
  11. 11.33 + ? = 100
  12. 12.1 + ? = 10
  13. 13.5 + ? = 10
  14. 14.25 + ? = 100
  15. 15.53 + ? = 100
  16. 16.78 + ? = 100
  17. 17.29 + ? = 100
  18. 18.52 + ? = 100
  19. 19.42 + ? = 100
  20. 20.70 + ? = 100
  21. 21.11 + ? = 100
  22. 22.24 + ? = 100
  23. 23.77 + ? = 100
  24. 24.8 + ? = 10
  25. 25.4 + ? = 10
  26. 26.37 + ? = 100
  27. 27.81 + ? = 100
  28. 28.31 + ? = 100
  29. 29.44 + ? = 100
  30. 30.64 + ? = 100
  31. 31.3 + ? = 10
  32. 32.69 + ? = 100
  33. 33.34 + ? = 100
  34. 34.22 + ? = 100
  35. 35.51 + ? = 100
  36. 36.86 + ? = 100
  37. 37.85 + ? = 100
  38. 38.89 + ? = 100
  39. 39.30 + ? = 100
  40. 40.43 + ? = 100

Answer key

  1. 8
  2. 81
  3. 1
  4. 62
  5. 4
  6. 61
  7. 44
  8. 27
  9. 3
  10. 84
  11. 67
  12. 9
  13. 5
  14. 75
  15. 47
  16. 22
  17. 71
  18. 48
  19. 58
  20. 30
  21. 89
  22. 76
  23. 23
  24. 2
  25. 6
  26. 63
  27. 19
  28. 69
  29. 56
  30. 36
  31. 7
  32. 31
  33. 66
  34. 78
  35. 49
  36. 14
  37. 15
  38. 11
  39. 70
  40. 57

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