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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 69 · 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. 1.34 + ? = 100
  2. 2.2 + ? = 10
  3. 3.60 + ? = 100
  4. 4.81 + ? = 100
  5. 5.6 + ? = 10
  6. 6.32 + ? = 100
  7. 7.31 + ? = 100
  8. 8.55 + ? = 100
  9. 9.52 + ? = 100
  10. 10.1 + ? = 10
  11. 11.83 + ? = 100
  12. 12.5 + ? = 10
  13. 13.26 + ? = 100
  14. 14.44 + ? = 100
  15. 15.77 + ? = 100
  16. 16.68 + ? = 100
  17. 17.7 + ? = 10
  18. 18.3 + ? = 10
  19. 19.13 + ? = 100
  20. 20.40 + ? = 100
  21. 21.48 + ? = 100
  22. 22.59 + ? = 100
  23. 23.4 + ? = 10
  24. 24.42 + ? = 100
  25. 25.58 + ? = 100
  26. 26.49 + ? = 100
  27. 27.84 + ? = 100
  28. 28.12 + ? = 100
  29. 29.8 + ? = 10
  30. 30.38 + ? = 100
  31. 31.37 + ? = 100
  32. 32.36 + ? = 100
  33. 33.21 + ? = 100
  34. 34.69 + ? = 100
  35. 35.43 + ? = 100
  36. 36.29 + ? = 100
  37. 37.20 + ? = 100
  38. 38.53 + ? = 100
  39. 39.65 + ? = 100
  40. 40.47 + ? = 100

Answer key

  1. 66
  2. 8
  3. 40
  4. 19
  5. 4
  6. 68
  7. 69
  8. 45
  9. 48
  10. 9
  11. 17
  12. 5
  13. 74
  14. 56
  15. 23
  16. 32
  17. 3
  18. 7
  19. 87
  20. 60
  21. 52
  22. 41
  23. 6
  24. 58
  25. 42
  26. 51
  27. 16
  28. 88
  29. 2
  30. 62
  31. 63
  32. 64
  33. 79
  34. 31
  35. 57
  36. 71
  37. 80
  38. 47
  39. 35
  40. 53

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