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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 651 · 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. 2.1 + ? = 10
  3. 3.7 + ? = 10
  4. 4.31 + ? = 100
  5. 5.8 + ? = 10
  6. 6.6 + ? = 10
  7. 7.13 + ? = 100
  8. 8.47 + ? = 100
  9. 9.14 + ? = 100
  10. 10.81 + ? = 100
  11. 11.4 + ? = 10
  12. 12.75 + ? = 100
  13. 13.45 + ? = 100
  14. 14.3 + ? = 10
  15. 15.29 + ? = 100
  16. 16.38 + ? = 100
  17. 17.24 + ? = 100
  18. 18.69 + ? = 100
  19. 19.54 + ? = 100
  20. 20.74 + ? = 100
  21. 21.86 + ? = 100
  22. 22.5 + ? = 10
  23. 23.34 + ? = 100
  24. 24.33 + ? = 100
  25. 25.62 + ? = 100
  26. 26.59 + ? = 100
  27. 27.89 + ? = 100
  28. 28.15 + ? = 100
  29. 29.57 + ? = 100
  30. 30.36 + ? = 100
  31. 31.44 + ? = 100
  32. 32.49 + ? = 100
  33. 33.9 + ? = 10
  34. 34.17 + ? = 100
  35. 35.82 + ? = 100
  36. 36.28 + ? = 100
  37. 37.48 + ? = 100
  38. 38.51 + ? = 100
  39. 39.67 + ? = 100
  40. 40.37 + ? = 100

Answer key

  1. 8
  2. 9
  3. 3
  4. 69
  5. 2
  6. 4
  7. 87
  8. 53
  9. 86
  10. 19
  11. 6
  12. 25
  13. 55
  14. 7
  15. 71
  16. 62
  17. 76
  18. 31
  19. 46
  20. 26
  21. 14
  22. 5
  23. 66
  24. 67
  25. 38
  26. 41
  27. 11
  28. 85
  29. 43
  30. 64
  31. 56
  32. 51
  33. 1
  34. 83
  35. 18
  36. 72
  37. 52
  38. 49
  39. 33
  40. 63

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