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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 563 · 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. 2.5 + ? = 10
  3. 3.79 + ? = 100
  4. 4.33 + ? = 100
  5. 5.1 + ? = 10
  6. 6.32 + ? = 100
  7. 7.87 + ? = 100
  8. 8.4 + ? = 10
  9. 9.8 + ? = 10
  10. 10.18 + ? = 100
  11. 11.9 + ? = 10
  12. 12.55 + ? = 100
  13. 13.16 + ? = 100
  14. 14.3 + ? = 10
  15. 15.7 + ? = 10
  16. 16.25 + ? = 100
  17. 17.20 + ? = 100
  18. 18.89 + ? = 100
  19. 19.80 + ? = 100
  20. 20.12 + ? = 100
  21. 21.88 + ? = 100
  22. 22.2 + ? = 10
  23. 23.31 + ? = 100
  24. 24.13 + ? = 100
  25. 25.26 + ? = 100
  26. 26.41 + ? = 100
  27. 27.23 + ? = 100
  28. 28.30 + ? = 100
  29. 29.21 + ? = 100
  30. 30.71 + ? = 100
  31. 31.57 + ? = 100
  32. 32.70 + ? = 100
  33. 33.61 + ? = 100
  34. 34.11 + ? = 100
  35. 35.65 + ? = 100
  36. 36.54 + ? = 100
  37. 37.50 + ? = 100
  38. 38.22 + ? = 100
  39. 39.42 + ? = 100
  40. 40.38 + ? = 100

Answer key

  1. 40
  2. 5
  3. 21
  4. 67
  5. 9
  6. 68
  7. 13
  8. 6
  9. 2
  10. 82
  11. 1
  12. 45
  13. 84
  14. 7
  15. 3
  16. 75
  17. 80
  18. 11
  19. 20
  20. 88
  21. 12
  22. 8
  23. 69
  24. 87
  25. 74
  26. 59
  27. 77
  28. 70
  29. 79
  30. 29
  31. 43
  32. 30
  33. 39
  34. 89
  35. 35
  36. 46
  37. 50
  38. 78
  39. 58
  40. 62

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