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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 204 · 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. 1.61 + ? = 100
  2. 2.8 + ? = 10
  3. 3.3 + ? = 10
  4. 4.7 + ? = 10
  5. 5.64 + ? = 100
  6. 6.1 + ? = 10
  7. 7.43 + ? = 100
  8. 8.85 + ? = 100
  9. 9.9 + ? = 10
  10. 10.74 + ? = 100
  11. 11.18 + ? = 100
  12. 12.12 + ? = 100
  13. 13.87 + ? = 100
  14. 14.6 + ? = 10
  15. 15.70 + ? = 100
  16. 16.42 + ? = 100
  17. 17.59 + ? = 100
  18. 18.77 + ? = 100
  19. 19.15 + ? = 100
  20. 20.44 + ? = 100
  21. 21.72 + ? = 100
  22. 22.86 + ? = 100
  23. 23.54 + ? = 100
  24. 24.4 + ? = 10
  25. 25.40 + ? = 100
  26. 26.76 + ? = 100
  27. 27.68 + ? = 100
  28. 28.88 + ? = 100
  29. 29.31 + ? = 100
  30. 30.5 + ? = 10
  31. 31.32 + ? = 100
  32. 32.67 + ? = 100
  33. 33.41 + ? = 100
  34. 34.52 + ? = 100
  35. 35.2 + ? = 10
  36. 36.24 + ? = 100
  37. 37.80 + ? = 100
  38. 38.30 + ? = 100
  39. 39.82 + ? = 100
  40. 40.57 + ? = 100

Answer key

  1. 39
  2. 2
  3. 7
  4. 3
  5. 36
  6. 9
  7. 57
  8. 15
  9. 1
  10. 26
  11. 82
  12. 88
  13. 13
  14. 4
  15. 30
  16. 58
  17. 41
  18. 23
  19. 85
  20. 56
  21. 28
  22. 14
  23. 46
  24. 6
  25. 60
  26. 24
  27. 32
  28. 12
  29. 69
  30. 5
  31. 68
  32. 33
  33. 59
  34. 48
  35. 8
  36. 76
  37. 20
  38. 70
  39. 18
  40. 43

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