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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 113 · 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. 1.70 + ? = 100
  2. 2.3 + ? = 10
  3. 3.6 + ? = 10
  4. 4.4 + ? = 10
  5. 5.56 + ? = 100
  6. 6.74 + ? = 100
  7. 7.64 + ? = 100
  8. 8.41 + ? = 100
  9. 9.1 + ? = 10
  10. 10.52 + ? = 100
  11. 11.88 + ? = 100
  12. 12.5 + ? = 10
  13. 13.68 + ? = 100
  14. 14.66 + ? = 100
  15. 15.87 + ? = 100
  16. 16.25 + ? = 100
  17. 17.57 + ? = 100
  18. 18.8 + ? = 10
  19. 19.2 + ? = 10
  20. 20.27 + ? = 100
  21. 21.49 + ? = 100
  22. 22.16 + ? = 100
  23. 23.9 + ? = 10
  24. 24.48 + ? = 100
  25. 25.65 + ? = 100
  26. 26.7 + ? = 10
  27. 27.42 + ? = 100
  28. 28.31 + ? = 100
  29. 29.85 + ? = 100
  30. 30.23 + ? = 100
  31. 31.89 + ? = 100
  32. 32.79 + ? = 100
  33. 33.15 + ? = 100
  34. 34.44 + ? = 100
  35. 35.18 + ? = 100
  36. 36.81 + ? = 100
  37. 37.71 + ? = 100
  38. 38.29 + ? = 100
  39. 39.40 + ? = 100
  40. 40.34 + ? = 100

Answer key

  1. 30
  2. 7
  3. 4
  4. 6
  5. 44
  6. 26
  7. 36
  8. 59
  9. 9
  10. 48
  11. 12
  12. 5
  13. 32
  14. 34
  15. 13
  16. 75
  17. 43
  18. 2
  19. 8
  20. 73
  21. 51
  22. 84
  23. 1
  24. 52
  25. 35
  26. 3
  27. 58
  28. 69
  29. 15
  30. 77
  31. 11
  32. 21
  33. 85
  34. 56
  35. 82
  36. 19
  37. 29
  38. 71
  39. 60
  40. 66

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