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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 211 · 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. 2.1 + ? = 10
  3. 3.29 + ? = 100
  4. 4.9 + ? = 10
  5. 5.7 + ? = 10
  6. 6.63 + ? = 100
  7. 7.48 + ? = 100
  8. 8.3 + ? = 10
  9. 9.5 + ? = 10
  10. 10.52 + ? = 100
  11. 11.31 + ? = 100
  12. 12.6 + ? = 10
  13. 13.8 + ? = 10
  14. 14.76 + ? = 100
  15. 15.14 + ? = 100
  16. 16.39 + ? = 100
  17. 17.13 + ? = 100
  18. 18.61 + ? = 100
  19. 19.67 + ? = 100
  20. 20.30 + ? = 100
  21. 21.59 + ? = 100
  22. 22.2 + ? = 10
  23. 23.15 + ? = 100
  24. 24.41 + ? = 100
  25. 25.81 + ? = 100
  26. 26.51 + ? = 100
  27. 27.33 + ? = 100
  28. 28.17 + ? = 100
  29. 29.65 + ? = 100
  30. 30.49 + ? = 100
  31. 31.25 + ? = 100
  32. 32.24 + ? = 100
  33. 33.23 + ? = 100
  34. 34.12 + ? = 100
  35. 35.50 + ? = 100
  36. 36.22 + ? = 100
  37. 37.55 + ? = 100
  38. 38.18 + ? = 100
  39. 39.19 + ? = 100
  40. 40.27 + ? = 100

Answer key

  1. 6
  2. 9
  3. 71
  4. 1
  5. 3
  6. 37
  7. 52
  8. 7
  9. 5
  10. 48
  11. 69
  12. 4
  13. 2
  14. 24
  15. 86
  16. 61
  17. 87
  18. 39
  19. 33
  20. 70
  21. 41
  22. 8
  23. 85
  24. 59
  25. 19
  26. 49
  27. 67
  28. 83
  29. 35
  30. 51
  31. 75
  32. 76
  33. 77
  34. 88
  35. 50
  36. 78
  37. 45
  38. 82
  39. 81
  40. 73

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