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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 345 · 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. 1.69 + ? = 100
  2. 2.1 + ? = 10
  3. 3.46 + ? = 100
  4. 4.4 + ? = 10
  5. 5.27 + ? = 100
  6. 6.2 + ? = 10
  7. 7.20 + ? = 100
  8. 8.9 + ? = 10
  9. 9.14 + ? = 100
  10. 10.87 + ? = 100
  11. 11.73 + ? = 100
  12. 12.8 + ? = 10
  13. 13.6 + ? = 10
  14. 14.5 + ? = 10
  15. 15.81 + ? = 100
  16. 16.32 + ? = 100
  17. 17.82 + ? = 100
  18. 18.3 + ? = 10
  19. 19.71 + ? = 100
  20. 20.7 + ? = 10
  21. 21.43 + ? = 100
  22. 22.35 + ? = 100
  23. 23.12 + ? = 100
  24. 24.38 + ? = 100
  25. 25.66 + ? = 100
  26. 26.17 + ? = 100
  27. 27.28 + ? = 100
  28. 28.65 + ? = 100
  29. 29.29 + ? = 100
  30. 30.64 + ? = 100
  31. 31.37 + ? = 100
  32. 32.76 + ? = 100
  33. 33.60 + ? = 100
  34. 34.67 + ? = 100
  35. 35.63 + ? = 100
  36. 36.24 + ? = 100
  37. 37.22 + ? = 100
  38. 38.45 + ? = 100
  39. 39.50 + ? = 100
  40. 40.85 + ? = 100

Answer key

  1. 31
  2. 9
  3. 54
  4. 6
  5. 73
  6. 8
  7. 80
  8. 1
  9. 86
  10. 13
  11. 27
  12. 2
  13. 4
  14. 5
  15. 19
  16. 68
  17. 18
  18. 7
  19. 29
  20. 3
  21. 57
  22. 65
  23. 88
  24. 62
  25. 34
  26. 83
  27. 72
  28. 35
  29. 71
  30. 36
  31. 63
  32. 24
  33. 40
  34. 33
  35. 37
  36. 76
  37. 78
  38. 55
  39. 50
  40. 15

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