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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 184 · 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. 1.89 + ? = 100
  2. 2.7 + ? = 10
  3. 3.64 + ? = 100
  4. 4.3 + ? = 10
  5. 5.9 + ? = 10
  6. 6.5 + ? = 10
  7. 7.31 + ? = 100
  8. 8.51 + ? = 100
  9. 9.43 + ? = 100
  10. 10.47 + ? = 100
  11. 11.35 + ? = 100
  12. 12.8 + ? = 10
  13. 13.50 + ? = 100
  14. 14.65 + ? = 100
  15. 15.25 + ? = 100
  16. 16.20 + ? = 100
  17. 17.11 + ? = 100
  18. 18.76 + ? = 100
  19. 19.75 + ? = 100
  20. 20.2 + ? = 10
  21. 21.63 + ? = 100
  22. 22.6 + ? = 10
  23. 23.4 + ? = 10
  24. 24.61 + ? = 100
  25. 25.88 + ? = 100
  26. 26.14 + ? = 100
  27. 27.49 + ? = 100
  28. 28.22 + ? = 100
  29. 29.29 + ? = 100
  30. 30.28 + ? = 100
  31. 31.40 + ? = 100
  32. 32.57 + ? = 100
  33. 33.80 + ? = 100
  34. 34.45 + ? = 100
  35. 35.15 + ? = 100
  36. 36.30 + ? = 100
  37. 37.1 + ? = 10
  38. 38.41 + ? = 100
  39. 39.82 + ? = 100
  40. 40.60 + ? = 100

Answer key

  1. 11
  2. 3
  3. 36
  4. 7
  5. 1
  6. 5
  7. 69
  8. 49
  9. 57
  10. 53
  11. 65
  12. 2
  13. 50
  14. 35
  15. 75
  16. 80
  17. 89
  18. 24
  19. 25
  20. 8
  21. 37
  22. 4
  23. 6
  24. 39
  25. 12
  26. 86
  27. 51
  28. 78
  29. 71
  30. 72
  31. 60
  32. 43
  33. 20
  34. 55
  35. 85
  36. 70
  37. 9
  38. 59
  39. 18
  40. 40

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