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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 19 · 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. 1.38 + ? = 100
  2. 2.9 + ? = 10
  3. 3.67 + ? = 100
  4. 4.46 + ? = 100
  5. 5.7 + ? = 10
  6. 6.14 + ? = 100
  7. 7.44 + ? = 100
  8. 8.1 + ? = 10
  9. 9.60 + ? = 100
  10. 10.6 + ? = 10
  11. 11.42 + ? = 100
  12. 12.76 + ? = 100
  13. 13.3 + ? = 10
  14. 14.2 + ? = 10
  15. 15.79 + ? = 100
  16. 16.28 + ? = 100
  17. 17.11 + ? = 100
  18. 18.41 + ? = 100
  19. 19.4 + ? = 10
  20. 20.5 + ? = 10
  21. 21.78 + ? = 100
  22. 22.87 + ? = 100
  23. 23.57 + ? = 100
  24. 24.64 + ? = 100
  25. 25.52 + ? = 100
  26. 26.25 + ? = 100
  27. 27.53 + ? = 100
  28. 28.8 + ? = 10
  29. 29.48 + ? = 100
  30. 30.34 + ? = 100
  31. 31.27 + ? = 100
  32. 32.66 + ? = 100
  33. 33.54 + ? = 100
  34. 34.81 + ? = 100
  35. 35.73 + ? = 100
  36. 36.19 + ? = 100
  37. 37.71 + ? = 100
  38. 38.31 + ? = 100
  39. 39.32 + ? = 100
  40. 40.83 + ? = 100

Answer key

  1. 62
  2. 1
  3. 33
  4. 54
  5. 3
  6. 86
  7. 56
  8. 9
  9. 40
  10. 4
  11. 58
  12. 24
  13. 7
  14. 8
  15. 21
  16. 72
  17. 89
  18. 59
  19. 6
  20. 5
  21. 22
  22. 13
  23. 43
  24. 36
  25. 48
  26. 75
  27. 47
  28. 2
  29. 52
  30. 66
  31. 73
  32. 34
  33. 46
  34. 19
  35. 27
  36. 81
  37. 29
  38. 69
  39. 68
  40. 17

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