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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 210 · 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. 1.3 + ? = 10
  2. 2.9 + ? = 10
  3. 3.4 + ? = 10
  4. 4.59 + ? = 100
  5. 5.2 + ? = 10
  6. 6.1 + ? = 10
  7. 7.51 + ? = 100
  8. 8.17 + ? = 100
  9. 9.8 + ? = 10
  10. 10.69 + ? = 100
  11. 11.79 + ? = 100
  12. 12.18 + ? = 100
  13. 13.35 + ? = 100
  14. 14.6 + ? = 10
  15. 15.73 + ? = 100
  16. 16.15 + ? = 100
  17. 17.70 + ? = 100
  18. 18.28 + ? = 100
  19. 19.64 + ? = 100
  20. 20.65 + ? = 100
  21. 21.87 + ? = 100
  22. 22.25 + ? = 100
  23. 23.5 + ? = 10
  24. 24.84 + ? = 100
  25. 25.38 + ? = 100
  26. 26.76 + ? = 100
  27. 27.61 + ? = 100
  28. 28.50 + ? = 100
  29. 29.56 + ? = 100
  30. 30.30 + ? = 100
  31. 31.37 + ? = 100
  32. 32.23 + ? = 100
  33. 33.57 + ? = 100
  34. 34.40 + ? = 100
  35. 35.75 + ? = 100
  36. 36.48 + ? = 100
  37. 37.44 + ? = 100
  38. 38.16 + ? = 100
  39. 39.7 + ? = 10
  40. 40.27 + ? = 100

Answer key

  1. 7
  2. 1
  3. 6
  4. 41
  5. 8
  6. 9
  7. 49
  8. 83
  9. 2
  10. 31
  11. 21
  12. 82
  13. 65
  14. 4
  15. 27
  16. 85
  17. 30
  18. 72
  19. 36
  20. 35
  21. 13
  22. 75
  23. 5
  24. 16
  25. 62
  26. 24
  27. 39
  28. 50
  29. 44
  30. 70
  31. 63
  32. 77
  33. 43
  34. 60
  35. 25
  36. 52
  37. 56
  38. 84
  39. 3
  40. 73

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