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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 146 · 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. 2.7 + ? = 10
  3. 3.30 + ? = 100
  4. 4.52 + ? = 100
  5. 5.49 + ? = 100
  6. 6.63 + ? = 100
  7. 7.2 + ? = 10
  8. 8.12 + ? = 100
  9. 9.84 + ? = 100
  10. 10.43 + ? = 100
  11. 11.6 + ? = 10
  12. 12.75 + ? = 100
  13. 13.39 + ? = 100
  14. 14.57 + ? = 100
  15. 15.33 + ? = 100
  16. 16.87 + ? = 100
  17. 17.73 + ? = 100
  18. 18.9 + ? = 10
  19. 19.1 + ? = 10
  20. 20.37 + ? = 100
  21. 21.44 + ? = 100
  22. 22.23 + ? = 100
  23. 23.8 + ? = 10
  24. 24.77 + ? = 100
  25. 25.64 + ? = 100
  26. 26.11 + ? = 100
  27. 27.69 + ? = 100
  28. 28.59 + ? = 100
  29. 29.15 + ? = 100
  30. 30.61 + ? = 100
  31. 31.5 + ? = 10
  32. 32.35 + ? = 100
  33. 33.71 + ? = 100
  34. 34.89 + ? = 100
  35. 35.31 + ? = 100
  36. 36.34 + ? = 100
  37. 37.3 + ? = 10
  38. 38.18 + ? = 100
  39. 39.32 + ? = 100
  40. 40.27 + ? = 100

Answer key

  1. 6
  2. 3
  3. 70
  4. 48
  5. 51
  6. 37
  7. 8
  8. 88
  9. 16
  10. 57
  11. 4
  12. 25
  13. 61
  14. 43
  15. 67
  16. 13
  17. 27
  18. 1
  19. 9
  20. 63
  21. 56
  22. 77
  23. 2
  24. 23
  25. 36
  26. 89
  27. 31
  28. 41
  29. 85
  30. 39
  31. 5
  32. 65
  33. 29
  34. 11
  35. 69
  36. 66
  37. 7
  38. 82
  39. 68
  40. 73

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