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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 546 · 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. 1.6 + ? = 10
  2. 2.7 + ? = 10
  3. 3.28 + ? = 100
  4. 4.78 + ? = 100
  5. 5.88 + ? = 100
  6. 6.1 + ? = 10
  7. 7.43 + ? = 100
  8. 8.3 + ? = 10
  9. 9.5 + ? = 10
  10. 10.4 + ? = 10
  11. 11.9 + ? = 10
  12. 12.44 + ? = 100
  13. 13.57 + ? = 100
  14. 14.54 + ? = 100
  15. 15.15 + ? = 100
  16. 16.8 + ? = 10
  17. 17.18 + ? = 100
  18. 18.2 + ? = 10
  19. 19.25 + ? = 100
  20. 20.27 + ? = 100
  21. 21.55 + ? = 100
  22. 22.61 + ? = 100
  23. 23.59 + ? = 100
  24. 24.47 + ? = 100
  25. 25.72 + ? = 100
  26. 26.56 + ? = 100
  27. 27.68 + ? = 100
  28. 28.38 + ? = 100
  29. 29.67 + ? = 100
  30. 30.51 + ? = 100
  31. 31.29 + ? = 100
  32. 32.42 + ? = 100
  33. 33.16 + ? = 100
  34. 34.30 + ? = 100
  35. 35.52 + ? = 100
  36. 36.73 + ? = 100
  37. 37.14 + ? = 100
  38. 38.46 + ? = 100
  39. 39.17 + ? = 100
  40. 40.32 + ? = 100

Answer key

  1. 4
  2. 3
  3. 72
  4. 22
  5. 12
  6. 9
  7. 57
  8. 7
  9. 5
  10. 6
  11. 1
  12. 56
  13. 43
  14. 46
  15. 85
  16. 2
  17. 82
  18. 8
  19. 75
  20. 73
  21. 45
  22. 39
  23. 41
  24. 53
  25. 28
  26. 44
  27. 32
  28. 62
  29. 33
  30. 49
  31. 71
  32. 58
  33. 84
  34. 70
  35. 48
  36. 27
  37. 86
  38. 54
  39. 83
  40. 68

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