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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 372 · 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. 1.48 + ? = 100
  2. 2.8 + ? = 10
  3. 3.40 + ? = 100
  4. 4.66 + ? = 100
  5. 5.43 + ? = 100
  6. 6.1 + ? = 10
  7. 7.9 + ? = 10
  8. 8.20 + ? = 100
  9. 9.27 + ? = 100
  10. 10.23 + ? = 100
  11. 11.7 + ? = 10
  12. 12.26 + ? = 100
  13. 13.2 + ? = 10
  14. 14.54 + ? = 100
  15. 15.5 + ? = 10
  16. 16.50 + ? = 100
  17. 17.83 + ? = 100
  18. 18.13 + ? = 100
  19. 19.76 + ? = 100
  20. 20.3 + ? = 10
  21. 21.11 + ? = 100
  22. 22.46 + ? = 100
  23. 23.63 + ? = 100
  24. 24.87 + ? = 100
  25. 25.72 + ? = 100
  26. 26.55 + ? = 100
  27. 27.35 + ? = 100
  28. 28.4 + ? = 10
  29. 29.81 + ? = 100
  30. 30.6 + ? = 10
  31. 31.61 + ? = 100
  32. 32.19 + ? = 100
  33. 33.65 + ? = 100
  34. 34.38 + ? = 100
  35. 35.42 + ? = 100
  36. 36.18 + ? = 100
  37. 37.70 + ? = 100
  38. 38.62 + ? = 100
  39. 39.44 + ? = 100
  40. 40.82 + ? = 100

Answer key

  1. 52
  2. 2
  3. 60
  4. 34
  5. 57
  6. 9
  7. 1
  8. 80
  9. 73
  10. 77
  11. 3
  12. 74
  13. 8
  14. 46
  15. 5
  16. 50
  17. 17
  18. 87
  19. 24
  20. 7
  21. 89
  22. 54
  23. 37
  24. 13
  25. 28
  26. 45
  27. 65
  28. 6
  29. 19
  30. 4
  31. 39
  32. 81
  33. 35
  34. 62
  35. 58
  36. 82
  37. 30
  38. 38
  39. 56
  40. 18

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