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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 367 · 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. 1.4 + ? = 10
  2. 2.49 + ? = 100
  3. 3.88 + ? = 100
  4. 4.60 + ? = 100
  5. 5.7 + ? = 10
  6. 6.23 + ? = 100
  7. 7.82 + ? = 100
  8. 8.72 + ? = 100
  9. 9.41 + ? = 100
  10. 10.8 + ? = 10
  11. 11.64 + ? = 100
  12. 12.19 + ? = 100
  13. 13.2 + ? = 10
  14. 14.1 + ? = 10
  15. 15.61 + ? = 100
  16. 16.36 + ? = 100
  17. 17.86 + ? = 100
  18. 18.67 + ? = 100
  19. 19.9 + ? = 10
  20. 20.52 + ? = 100
  21. 21.32 + ? = 100
  22. 22.5 + ? = 10
  23. 23.33 + ? = 100
  24. 24.26 + ? = 100
  25. 25.3 + ? = 10
  26. 26.77 + ? = 100
  27. 27.22 + ? = 100
  28. 28.66 + ? = 100
  29. 29.28 + ? = 100
  30. 30.63 + ? = 100
  31. 31.31 + ? = 100
  32. 32.89 + ? = 100
  33. 33.6 + ? = 10
  34. 34.34 + ? = 100
  35. 35.13 + ? = 100
  36. 36.43 + ? = 100
  37. 37.81 + ? = 100
  38. 38.45 + ? = 100
  39. 39.40 + ? = 100
  40. 40.24 + ? = 100

Answer key

  1. 6
  2. 51
  3. 12
  4. 40
  5. 3
  6. 77
  7. 18
  8. 28
  9. 59
  10. 2
  11. 36
  12. 81
  13. 8
  14. 9
  15. 39
  16. 64
  17. 14
  18. 33
  19. 1
  20. 48
  21. 68
  22. 5
  23. 67
  24. 74
  25. 7
  26. 23
  27. 78
  28. 34
  29. 72
  30. 37
  31. 69
  32. 11
  33. 4
  34. 66
  35. 87
  36. 57
  37. 19
  38. 55
  39. 60
  40. 76

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