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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 307 · 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. 1.69 + ? = 100
  2. 2.2 + ? = 10
  3. 3.89 + ? = 100
  4. 4.34 + ? = 100
  5. 5.9 + ? = 10
  6. 6.14 + ? = 100
  7. 7.18 + ? = 100
  8. 8.59 + ? = 100
  9. 9.22 + ? = 100
  10. 10.1 + ? = 10
  11. 11.85 + ? = 100
  12. 12.6 + ? = 10
  13. 13.7 + ? = 10
  14. 14.8 + ? = 10
  15. 15.3 + ? = 10
  16. 16.66 + ? = 100
  17. 17.51 + ? = 100
  18. 18.5 + ? = 10
  19. 19.77 + ? = 100
  20. 20.54 + ? = 100
  21. 21.62 + ? = 100
  22. 22.80 + ? = 100
  23. 23.23 + ? = 100
  24. 24.75 + ? = 100
  25. 25.74 + ? = 100
  26. 26.48 + ? = 100
  27. 27.52 + ? = 100
  28. 28.12 + ? = 100
  29. 29.78 + ? = 100
  30. 30.71 + ? = 100
  31. 31.35 + ? = 100
  32. 32.29 + ? = 100
  33. 33.4 + ? = 10
  34. 34.46 + ? = 100
  35. 35.56 + ? = 100
  36. 36.65 + ? = 100
  37. 37.19 + ? = 100
  38. 38.25 + ? = 100
  39. 39.83 + ? = 100
  40. 40.41 + ? = 100

Answer key

  1. 31
  2. 8
  3. 11
  4. 66
  5. 1
  6. 86
  7. 82
  8. 41
  9. 78
  10. 9
  11. 15
  12. 4
  13. 3
  14. 2
  15. 7
  16. 34
  17. 49
  18. 5
  19. 23
  20. 46
  21. 38
  22. 20
  23. 77
  24. 25
  25. 26
  26. 52
  27. 48
  28. 88
  29. 22
  30. 29
  31. 65
  32. 71
  33. 6
  34. 54
  35. 44
  36. 35
  37. 81
  38. 75
  39. 17
  40. 59

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