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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 420 · 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 126 =
  2. 2.Half of 62 =
  3. 3.Half of 142 =
  4. 4.Double 12 =
  5. 5.Double 76 =
  6. 6.Double 37 =
  7. 7.Double 84 =
  8. 8.Half of 54 =
  9. 9.Half of 58 =
  10. 10.Half of 86 =
  11. 11.Double 93 =
  12. 12.Double 63 =
  13. 13.Half of 52 =
  14. 14.Double 39 =
  15. 15.Double 43 =
  16. 16.Double 94 =
  17. 17.Half of 92 =
  18. 18.Half of 36 =
  19. 19.Double 17 =
  20. 20.Double 91 =
  21. 21.Double 96 =
  22. 22.Double 49 =
  23. 23.Half of 84 =
  24. 24.Double 99 =
  25. 25.Double 47 =
  26. 26.Double 78 =
  27. 27.Half of 178 =
  28. 28.Half of 68 =
  29. 29.Double 48 =
  30. 30.Double 11 =
  31. 31.Double 21 =
  32. 32.Double 86 =
  33. 33.Double 65 =
  34. 34.Half of 122 =
  35. 35.Half of 32 =
  36. 36.Half of 164 =
  37. 37.Double 53 =
  38. 38.Double 79 =
  39. 39.Half of 74 =
  40. 40.Double 36 =

Answer key

  1. 63
  2. 31
  3. 71
  4. 24
  5. 152
  6. 74
  7. 168
  8. 27
  9. 29
  10. 43
  11. 186
  12. 126
  13. 26
  14. 78
  15. 86
  16. 188
  17. 46
  18. 18
  19. 34
  20. 182
  21. 192
  22. 98
  23. 42
  24. 198
  25. 94
  26. 156
  27. 89
  28. 34
  29. 96
  30. 22
  31. 42
  32. 172
  33. 130
  34. 61
  35. 16
  36. 82
  37. 106
  38. 158
  39. 37
  40. 72

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