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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 682 · 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. 1.4 + ? = 10
  2. 2.56 + ? = 100
  3. 3.69 + ? = 100
  4. 4.9 + ? = 10
  5. 5.87 + ? = 100
  6. 6.51 + ? = 100
  7. 7.76 + ? = 100
  8. 8.6 + ? = 10
  9. 9.81 + ? = 100
  10. 10.77 + ? = 100
  11. 11.39 + ? = 100
  12. 12.67 + ? = 100
  13. 13.8 + ? = 10
  14. 14.54 + ? = 100
  15. 15.38 + ? = 100
  16. 16.35 + ? = 100
  17. 17.83 + ? = 100
  18. 18.1 + ? = 10
  19. 19.17 + ? = 100
  20. 20.25 + ? = 100
  21. 21.3 + ? = 10
  22. 22.75 + ? = 100
  23. 23.27 + ? = 100
  24. 24.2 + ? = 10
  25. 25.52 + ? = 100
  26. 26.5 + ? = 10
  27. 27.89 + ? = 100
  28. 28.22 + ? = 100
  29. 29.63 + ? = 100
  30. 30.21 + ? = 100
  31. 31.30 + ? = 100
  32. 32.46 + ? = 100
  33. 33.40 + ? = 100
  34. 34.7 + ? = 10
  35. 35.37 + ? = 100
  36. 36.29 + ? = 100
  37. 37.41 + ? = 100
  38. 38.58 + ? = 100
  39. 39.33 + ? = 100
  40. 40.13 + ? = 100

Answer key

  1. 6
  2. 44
  3. 31
  4. 1
  5. 13
  6. 49
  7. 24
  8. 4
  9. 19
  10. 23
  11. 61
  12. 33
  13. 2
  14. 46
  15. 62
  16. 65
  17. 17
  18. 9
  19. 83
  20. 75
  21. 7
  22. 25
  23. 73
  24. 8
  25. 48
  26. 5
  27. 11
  28. 78
  29. 37
  30. 79
  31. 70
  32. 54
  33. 60
  34. 3
  35. 63
  36. 71
  37. 59
  38. 42
  39. 67
  40. 87

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