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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 308 · 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. 1.27 + ? = 100
  2. 2.2 + ? = 10
  3. 3.54 + ? = 100
  4. 4.4 + ? = 10
  5. 5.5 + ? = 10
  6. 6.30 + ? = 100
  7. 7.6 + ? = 10
  8. 8.40 + ? = 100
  9. 9.8 + ? = 10
  10. 10.7 + ? = 10
  11. 11.59 + ? = 100
  12. 12.81 + ? = 100
  13. 13.66 + ? = 100
  14. 14.29 + ? = 100
  15. 15.72 + ? = 100
  16. 16.37 + ? = 100
  17. 17.65 + ? = 100
  18. 18.52 + ? = 100
  19. 19.1 + ? = 10
  20. 20.12 + ? = 100
  21. 21.22 + ? = 100
  22. 22.16 + ? = 100
  23. 23.61 + ? = 100
  24. 24.9 + ? = 10
  25. 25.55 + ? = 100
  26. 26.68 + ? = 100
  27. 27.44 + ? = 100
  28. 28.36 + ? = 100
  29. 29.19 + ? = 100
  30. 30.13 + ? = 100
  31. 31.3 + ? = 10
  32. 32.88 + ? = 100
  33. 33.49 + ? = 100
  34. 34.73 + ? = 100
  35. 35.24 + ? = 100
  36. 36.31 + ? = 100
  37. 37.62 + ? = 100
  38. 38.33 + ? = 100
  39. 39.39 + ? = 100
  40. 40.80 + ? = 100

Answer key

  1. 73
  2. 8
  3. 46
  4. 6
  5. 5
  6. 70
  7. 4
  8. 60
  9. 2
  10. 3
  11. 41
  12. 19
  13. 34
  14. 71
  15. 28
  16. 63
  17. 35
  18. 48
  19. 9
  20. 88
  21. 78
  22. 84
  23. 39
  24. 1
  25. 45
  26. 32
  27. 56
  28. 64
  29. 81
  30. 87
  31. 7
  32. 12
  33. 51
  34. 27
  35. 76
  36. 69
  37. 38
  38. 67
  39. 61
  40. 20

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