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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 900 · 40 questions
TalentJR

The trick (Split and double): Split the number into tens and ones: 37 = 30 + 7. Double each part (30 → 60, 7 → 14) — or halve each part. Add the two answers: 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.Half of 182 =
  2. 2.Double 27 =
  3. 3.Half of 32 =
  4. 4.Double 87 =
  5. 5.Double 81 =
  6. 6.Half of 152 =
  7. 7.Double 59 =
  8. 8.Half of 48 =
  9. 9.Double 96 =
  10. 10.Double 98 =
  11. 11.Double 84 =
  12. 12.Half of 168 =
  13. 13.Double 11 =
  14. 14.Half of 64 =
  15. 15.Double 12 =
  16. 16.Half of 76 =
  17. 17.Half of 88 =
  18. 18.Half of 44 =
  19. 19.Double 71 =
  20. 20.Half of 98 =
  21. 21.Double 85 =
  22. 22.Half of 186 =
  23. 23.Double 18 =
  24. 24.Double 36 =
  25. 25.Half of 22 =
  26. 26.Half of 122 =
  27. 27.Double 52 =
  28. 28.Double 29 =
  29. 29.Double 46 =
  30. 30.Half of 54 =
  31. 31.Double 91 =
  32. 32.Half of 34 =
  33. 33.Half of 52 =
  34. 34.Double 31 =
  35. 35.Double 49 =
  36. 36.Half of 68 =
  37. 37.Half of 86 =
  38. 38.Half of 178 =
  39. 39.Half of 102 =
  40. 40.Double 45 =

Answer key

  1. 91
  2. 54
  3. 16
  4. 174
  5. 162
  6. 76
  7. 118
  8. 24
  9. 192
  10. 196
  11. 168
  12. 84
  13. 22
  14. 32
  15. 24
  16. 38
  17. 44
  18. 22
  19. 142
  20. 49
  21. 170
  22. 93
  23. 36
  24. 72
  25. 11
  26. 61
  27. 104
  28. 58
  29. 92
  30. 27
  31. 182
  32. 17
  33. 26
  34. 62
  35. 98
  36. 34
  37. 43
  38. 89
  39. 51
  40. 90

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