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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 714 · 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. 1.1 + ? = 10
  2. 2.28 + ? = 100
  3. 3.7 + ? = 10
  4. 4.64 + ? = 100
  5. 5.5 + ? = 10
  6. 6.33 + ? = 100
  7. 7.23 + ? = 100
  8. 8.3 + ? = 10
  9. 9.6 + ? = 10
  10. 10.16 + ? = 100
  11. 11.2 + ? = 10
  12. 12.4 + ? = 10
  13. 13.8 + ? = 10
  14. 14.32 + ? = 100
  15. 15.14 + ? = 100
  16. 16.60 + ? = 100
  17. 17.72 + ? = 100
  18. 18.40 + ? = 100
  19. 19.75 + ? = 100
  20. 20.17 + ? = 100
  21. 21.45 + ? = 100
  22. 22.12 + ? = 100
  23. 23.9 + ? = 10
  24. 24.46 + ? = 100
  25. 25.79 + ? = 100
  26. 26.35 + ? = 100
  27. 27.71 + ? = 100
  28. 28.74 + ? = 100
  29. 29.36 + ? = 100
  30. 30.86 + ? = 100
  31. 31.49 + ? = 100
  32. 32.68 + ? = 100
  33. 33.51 + ? = 100
  34. 34.44 + ? = 100
  35. 35.83 + ? = 100
  36. 36.19 + ? = 100
  37. 37.78 + ? = 100
  38. 38.56 + ? = 100
  39. 39.42 + ? = 100
  40. 40.13 + ? = 100

Answer key

  1. 9
  2. 72
  3. 3
  4. 36
  5. 5
  6. 67
  7. 77
  8. 7
  9. 4
  10. 84
  11. 8
  12. 6
  13. 2
  14. 68
  15. 86
  16. 40
  17. 28
  18. 60
  19. 25
  20. 83
  21. 55
  22. 88
  23. 1
  24. 54
  25. 21
  26. 65
  27. 29
  28. 26
  29. 64
  30. 14
  31. 51
  32. 32
  33. 49
  34. 56
  35. 17
  36. 81
  37. 22
  38. 44
  39. 58
  40. 87

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