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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 98 · 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. 1.2 + ? = 10
  2. 2.19 + ? = 100
  3. 3.18 + ? = 100
  4. 4.74 + ? = 100
  5. 5.72 + ? = 100
  6. 6.9 + ? = 10
  7. 7.66 + ? = 100
  8. 8.5 + ? = 10
  9. 9.26 + ? = 100
  10. 10.3 + ? = 10
  11. 11.7 + ? = 10
  12. 12.23 + ? = 100
  13. 13.71 + ? = 100
  14. 14.35 + ? = 100
  15. 15.76 + ? = 100
  16. 16.24 + ? = 100
  17. 17.4 + ? = 10
  18. 18.22 + ? = 100
  19. 19.80 + ? = 100
  20. 20.6 + ? = 10
  21. 21.39 + ? = 100
  22. 22.1 + ? = 10
  23. 23.8 + ? = 10
  24. 24.32 + ? = 100
  25. 25.21 + ? = 100
  26. 26.34 + ? = 100
  27. 27.58 + ? = 100
  28. 28.63 + ? = 100
  29. 29.11 + ? = 100
  30. 30.59 + ? = 100
  31. 31.82 + ? = 100
  32. 32.49 + ? = 100
  33. 33.29 + ? = 100
  34. 34.67 + ? = 100
  35. 35.70 + ? = 100
  36. 36.60 + ? = 100
  37. 37.17 + ? = 100
  38. 38.89 + ? = 100
  39. 39.75 + ? = 100
  40. 40.28 + ? = 100

Answer key

  1. 8
  2. 81
  3. 82
  4. 26
  5. 28
  6. 1
  7. 34
  8. 5
  9. 74
  10. 7
  11. 3
  12. 77
  13. 29
  14. 65
  15. 24
  16. 76
  17. 6
  18. 78
  19. 20
  20. 4
  21. 61
  22. 9
  23. 2
  24. 68
  25. 79
  26. 66
  27. 42
  28. 37
  29. 89
  30. 41
  31. 18
  32. 51
  33. 71
  34. 33
  35. 30
  36. 40
  37. 83
  38. 11
  39. 25
  40. 72

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