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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 593 · 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. 1.60 + ? = 100
  2. 2.89 + ? = 100
  3. 3.48 + ? = 100
  4. 4.7 + ? = 10
  5. 5.2 + ? = 10
  6. 6.63 + ? = 100
  7. 7.78 + ? = 100
  8. 8.52 + ? = 100
  9. 9.83 + ? = 100
  10. 10.50 + ? = 100
  11. 11.77 + ? = 100
  12. 12.1 + ? = 10
  13. 13.23 + ? = 100
  14. 14.16 + ? = 100
  15. 15.32 + ? = 100
  16. 16.70 + ? = 100
  17. 17.15 + ? = 100
  18. 18.8 + ? = 10
  19. 19.30 + ? = 100
  20. 20.28 + ? = 100
  21. 21.9 + ? = 10
  22. 22.27 + ? = 100
  23. 23.5 + ? = 10
  24. 24.69 + ? = 100
  25. 25.68 + ? = 100
  26. 26.12 + ? = 100
  27. 27.59 + ? = 100
  28. 28.4 + ? = 10
  29. 29.31 + ? = 100
  30. 30.45 + ? = 100
  31. 31.3 + ? = 10
  32. 32.20 + ? = 100
  33. 33.54 + ? = 100
  34. 34.18 + ? = 100
  35. 35.86 + ? = 100
  36. 36.39 + ? = 100
  37. 37.65 + ? = 100
  38. 38.6 + ? = 10
  39. 39.67 + ? = 100
  40. 40.57 + ? = 100

Answer key

  1. 40
  2. 11
  3. 52
  4. 3
  5. 8
  6. 37
  7. 22
  8. 48
  9. 17
  10. 50
  11. 23
  12. 9
  13. 77
  14. 84
  15. 68
  16. 30
  17. 85
  18. 2
  19. 70
  20. 72
  21. 1
  22. 73
  23. 5
  24. 31
  25. 32
  26. 88
  27. 41
  28. 6
  29. 69
  30. 55
  31. 7
  32. 80
  33. 46
  34. 82
  35. 14
  36. 61
  37. 35
  38. 4
  39. 33
  40. 43

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