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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 676 · 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. 2.3 + ? = 10
  3. 3.2 + ? = 10
  4. 4.25 + ? = 100
  5. 5.12 + ? = 100
  6. 6.29 + ? = 100
  7. 7.49 + ? = 100
  8. 8.8 + ? = 10
  9. 9.55 + ? = 100
  10. 10.35 + ? = 100
  11. 11.9 + ? = 10
  12. 12.34 + ? = 100
  13. 13.83 + ? = 100
  14. 14.5 + ? = 10
  15. 15.1 + ? = 10
  16. 16.6 + ? = 10
  17. 17.45 + ? = 100
  18. 18.16 + ? = 100
  19. 19.11 + ? = 100
  20. 20.28 + ? = 100
  21. 21.32 + ? = 100
  22. 22.22 + ? = 100
  23. 23.63 + ? = 100
  24. 24.7 + ? = 10
  25. 25.15 + ? = 100
  26. 26.75 + ? = 100
  27. 27.48 + ? = 100
  28. 28.40 + ? = 100
  29. 29.23 + ? = 100
  30. 30.39 + ? = 100
  31. 31.26 + ? = 100
  32. 32.82 + ? = 100
  33. 33.47 + ? = 100
  34. 34.52 + ? = 100
  35. 35.27 + ? = 100
  36. 36.59 + ? = 100
  37. 37.18 + ? = 100
  38. 38.67 + ? = 100
  39. 39.53 + ? = 100
  40. 40.69 + ? = 100

Answer key

  1. 6
  2. 7
  3. 8
  4. 75
  5. 88
  6. 71
  7. 51
  8. 2
  9. 45
  10. 65
  11. 1
  12. 66
  13. 17
  14. 5
  15. 9
  16. 4
  17. 55
  18. 84
  19. 89
  20. 72
  21. 68
  22. 78
  23. 37
  24. 3
  25. 85
  26. 25
  27. 52
  28. 60
  29. 77
  30. 61
  31. 74
  32. 18
  33. 53
  34. 48
  35. 73
  36. 41
  37. 82
  38. 33
  39. 47
  40. 31

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