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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 107 · 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. 1.1 + ? = 10
  2. 2.7 + ? = 10
  3. 3.25 + ? = 100
  4. 4.2 + ? = 10
  5. 5.41 + ? = 100
  6. 6.48 + ? = 100
  7. 7.5 + ? = 10
  8. 8.81 + ? = 100
  9. 9.8 + ? = 10
  10. 10.36 + ? = 100
  11. 11.80 + ? = 100
  12. 12.76 + ? = 100
  13. 13.23 + ? = 100
  14. 14.68 + ? = 100
  15. 15.3 + ? = 10
  16. 16.83 + ? = 100
  17. 17.52 + ? = 100
  18. 18.27 + ? = 100
  19. 19.16 + ? = 100
  20. 20.4 + ? = 10
  21. 21.9 + ? = 10
  22. 22.37 + ? = 100
  23. 23.6 + ? = 10
  24. 24.62 + ? = 100
  25. 25.54 + ? = 100
  26. 26.69 + ? = 100
  27. 27.84 + ? = 100
  28. 28.73 + ? = 100
  29. 29.44 + ? = 100
  30. 30.35 + ? = 100
  31. 31.17 + ? = 100
  32. 32.31 + ? = 100
  33. 33.53 + ? = 100
  34. 34.33 + ? = 100
  35. 35.13 + ? = 100
  36. 36.14 + ? = 100
  37. 37.3 + ? = 10
  38. 38.38 + ? = 100
  39. 39.64 + ? = 100
  40. 40.45 + ? = 100

Answer key

  1. 9
  2. 3
  3. 75
  4. 8
  5. 59
  6. 52
  7. 5
  8. 19
  9. 2
  10. 64
  11. 20
  12. 24
  13. 77
  14. 32
  15. 7
  16. 17
  17. 48
  18. 73
  19. 84
  20. 6
  21. 1
  22. 63
  23. 4
  24. 38
  25. 46
  26. 31
  27. 16
  28. 27
  29. 56
  30. 65
  31. 83
  32. 69
  33. 47
  34. 67
  35. 87
  36. 86
  37. 7
  38. 62
  39. 36
  40. 55

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