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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 816 · 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. 1.66 + ? = 100
  2. 2.40 + ? = 100
  3. 3.61 + ? = 100
  4. 4.30 + ? = 100
  5. 5.3 + ? = 10
  6. 6.6 + ? = 10
  7. 7.60 + ? = 100
  8. 8.62 + ? = 100
  9. 9.8 + ? = 10
  10. 10.27 + ? = 100
  11. 11.4 + ? = 10
  12. 12.33 + ? = 100
  13. 13.22 + ? = 100
  14. 14.9 + ? = 10
  15. 15.51 + ? = 100
  16. 16.1 + ? = 10
  17. 17.35 + ? = 100
  18. 18.15 + ? = 100
  19. 19.72 + ? = 100
  20. 20.7 + ? = 10
  21. 21.88 + ? = 100
  22. 22.18 + ? = 100
  23. 23.36 + ? = 100
  24. 24.5 + ? = 10
  25. 25.2 + ? = 10
  26. 26.24 + ? = 100
  27. 27.81 + ? = 100
  28. 28.71 + ? = 100
  29. 29.53 + ? = 100
  30. 30.70 + ? = 100
  31. 31.63 + ? = 100
  32. 32.67 + ? = 100
  33. 33.31 + ? = 100
  34. 34.82 + ? = 100
  35. 35.50 + ? = 100
  36. 36.46 + ? = 100
  37. 37.26 + ? = 100
  38. 38.49 + ? = 100
  39. 39.34 + ? = 100
  40. 40.76 + ? = 100

Answer key

  1. 34
  2. 60
  3. 39
  4. 70
  5. 7
  6. 4
  7. 40
  8. 38
  9. 2
  10. 73
  11. 6
  12. 67
  13. 78
  14. 1
  15. 49
  16. 9
  17. 65
  18. 85
  19. 28
  20. 3
  21. 12
  22. 82
  23. 64
  24. 5
  25. 8
  26. 76
  27. 19
  28. 29
  29. 47
  30. 30
  31. 37
  32. 33
  33. 69
  34. 18
  35. 50
  36. 54
  37. 74
  38. 51
  39. 66
  40. 24

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