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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 216 · 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. 1.3 + ? = 10
  2. 2.9 + ? = 10
  3. 3.41 + ? = 100
  4. 4.7 + ? = 10
  5. 5.12 + ? = 100
  6. 6.29 + ? = 100
  7. 7.5 + ? = 10
  8. 8.4 + ? = 10
  9. 9.69 + ? = 100
  10. 10.11 + ? = 100
  11. 11.57 + ? = 100
  12. 12.22 + ? = 100
  13. 13.51 + ? = 100
  14. 14.38 + ? = 100
  15. 15.59 + ? = 100
  16. 16.77 + ? = 100
  17. 17.62 + ? = 100
  18. 18.2 + ? = 10
  19. 19.86 + ? = 100
  20. 20.6 + ? = 10
  21. 21.31 + ? = 100
  22. 22.58 + ? = 100
  23. 23.16 + ? = 100
  24. 24.14 + ? = 100
  25. 25.1 + ? = 10
  26. 26.8 + ? = 10
  27. 27.24 + ? = 100
  28. 28.75 + ? = 100
  29. 29.80 + ? = 100
  30. 30.48 + ? = 100
  31. 31.18 + ? = 100
  32. 32.46 + ? = 100
  33. 33.66 + ? = 100
  34. 34.79 + ? = 100
  35. 35.39 + ? = 100
  36. 36.25 + ? = 100
  37. 37.76 + ? = 100
  38. 38.68 + ? = 100
  39. 39.71 + ? = 100
  40. 40.67 + ? = 100

Answer key

  1. 7
  2. 1
  3. 59
  4. 3
  5. 88
  6. 71
  7. 5
  8. 6
  9. 31
  10. 89
  11. 43
  12. 78
  13. 49
  14. 62
  15. 41
  16. 23
  17. 38
  18. 8
  19. 14
  20. 4
  21. 69
  22. 42
  23. 84
  24. 86
  25. 9
  26. 2
  27. 76
  28. 25
  29. 20
  30. 52
  31. 82
  32. 54
  33. 34
  34. 21
  35. 61
  36. 75
  37. 24
  38. 32
  39. 29
  40. 33

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