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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 732 · 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. 1.89 + ? = 100
  2. 2.9 + ? = 10
  3. 3.15 + ? = 100
  4. 4.57 + ? = 100
  5. 5.52 + ? = 100
  6. 6.26 + ? = 100
  7. 7.6 + ? = 10
  8. 8.55 + ? = 100
  9. 9.34 + ? = 100
  10. 10.4 + ? = 10
  11. 11.47 + ? = 100
  12. 12.20 + ? = 100
  13. 13.7 + ? = 10
  14. 14.80 + ? = 100
  15. 15.8 + ? = 10
  16. 16.1 + ? = 10
  17. 17.48 + ? = 100
  18. 18.33 + ? = 100
  19. 19.3 + ? = 10
  20. 20.2 + ? = 10
  21. 21.46 + ? = 100
  22. 22.81 + ? = 100
  23. 23.71 + ? = 100
  24. 24.13 + ? = 100
  25. 25.5 + ? = 10
  26. 26.87 + ? = 100
  27. 27.11 + ? = 100
  28. 28.19 + ? = 100
  29. 29.63 + ? = 100
  30. 30.83 + ? = 100
  31. 31.82 + ? = 100
  32. 32.14 + ? = 100
  33. 33.39 + ? = 100
  34. 34.24 + ? = 100
  35. 35.30 + ? = 100
  36. 36.50 + ? = 100
  37. 37.69 + ? = 100
  38. 38.16 + ? = 100
  39. 39.32 + ? = 100
  40. 40.59 + ? = 100

Answer key

  1. 11
  2. 1
  3. 85
  4. 43
  5. 48
  6. 74
  7. 4
  8. 45
  9. 66
  10. 6
  11. 53
  12. 80
  13. 3
  14. 20
  15. 2
  16. 9
  17. 52
  18. 67
  19. 7
  20. 8
  21. 54
  22. 19
  23. 29
  24. 87
  25. 5
  26. 13
  27. 89
  28. 81
  29. 37
  30. 17
  31. 18
  32. 86
  33. 61
  34. 76
  35. 70
  36. 50
  37. 31
  38. 84
  39. 68
  40. 41

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