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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 849 · 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.Double 45 =
  2. 2.Double 54 =
  3. 3.Half of 38 =
  4. 4.Half of 24 =
  5. 5.Half of 32 =
  6. 6.Half of 142 =
  7. 7.Half of 132 =
  8. 8.Half of 62 =
  9. 9.Half of 26 =
  10. 10.Double 24 =
  11. 11.Double 59 =
  12. 12.Double 73 =
  13. 13.Half of 122 =
  14. 14.Double 33 =
  15. 15.Half of 106 =
  16. 16.Half of 124 =
  17. 17.Half of 86 =
  18. 18.Half of 98 =
  19. 19.Double 92 =
  20. 20.Double 15 =
  21. 21.Double 37 =
  22. 22.Double 31 =
  23. 23.Half of 102 =
  24. 24.Double 77 =
  25. 25.Half of 162 =
  26. 26.Double 65 =
  27. 27.Half of 96 =
  28. 28.Half of 144 =
  29. 29.Double 35 =
  30. 30.Double 86 =
  31. 31.Half of 166 =
  32. 32.Half of 192 =
  33. 33.Half of 42 =
  34. 34.Double 83 =
  35. 35.Double 53 =
  36. 36.Half of 152 =
  37. 37.Double 22 =
  38. 38.Double 76 =
  39. 39.Double 43 =
  40. 40.Double 88 =

Answer key

  1. 90
  2. 108
  3. 19
  4. 12
  5. 16
  6. 71
  7. 66
  8. 31
  9. 13
  10. 48
  11. 118
  12. 146
  13. 61
  14. 66
  15. 53
  16. 62
  17. 43
  18. 49
  19. 184
  20. 30
  21. 74
  22. 62
  23. 51
  24. 154
  25. 81
  26. 130
  27. 48
  28. 72
  29. 70
  30. 172
  31. 83
  32. 96
  33. 21
  34. 166
  35. 106
  36. 76
  37. 44
  38. 152
  39. 86
  40. 176

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