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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 537 · 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. 1.13 + ? = 100
  2. 2.2 + ? = 10
  3. 3.69 + ? = 100
  4. 4.55 + ? = 100
  5. 5.54 + ? = 100
  6. 6.46 + ? = 100
  7. 7.9 + ? = 10
  8. 8.88 + ? = 100
  9. 9.40 + ? = 100
  10. 10.7 + ? = 10
  11. 11.18 + ? = 100
  12. 12.22 + ? = 100
  13. 13.43 + ? = 100
  14. 14.77 + ? = 100
  15. 15.66 + ? = 100
  16. 16.3 + ? = 10
  17. 17.8 + ? = 10
  18. 18.1 + ? = 10
  19. 19.5 + ? = 10
  20. 20.49 + ? = 100
  21. 21.36 + ? = 100
  22. 22.27 + ? = 100
  23. 23.26 + ? = 100
  24. 24.6 + ? = 10
  25. 25.37 + ? = 100
  26. 26.72 + ? = 100
  27. 27.71 + ? = 100
  28. 28.19 + ? = 100
  29. 29.56 + ? = 100
  30. 30.34 + ? = 100
  31. 31.79 + ? = 100
  32. 32.53 + ? = 100
  33. 33.76 + ? = 100
  34. 34.14 + ? = 100
  35. 35.75 + ? = 100
  36. 36.86 + ? = 100
  37. 37.25 + ? = 100
  38. 38.63 + ? = 100
  39. 39.59 + ? = 100
  40. 40.84 + ? = 100

Answer key

  1. 87
  2. 8
  3. 31
  4. 45
  5. 46
  6. 54
  7. 1
  8. 12
  9. 60
  10. 3
  11. 82
  12. 78
  13. 57
  14. 23
  15. 34
  16. 7
  17. 2
  18. 9
  19. 5
  20. 51
  21. 64
  22. 73
  23. 74
  24. 4
  25. 63
  26. 28
  27. 29
  28. 81
  29. 44
  30. 66
  31. 21
  32. 47
  33. 24
  34. 86
  35. 25
  36. 14
  37. 75
  38. 37
  39. 41
  40. 16

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