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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 778 · 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 37 =
  2. 2.Double 98 =
  3. 3.Double 71 =
  4. 4.Double 68 =
  5. 5.Double 91 =
  6. 6.Half of 28 =
  7. 7.Half of 54 =
  8. 8.Half of 138 =
  9. 9.Half of 104 =
  10. 10.Half of 86 =
  11. 11.Half of 22 =
  12. 12.Double 12 =
  13. 13.Half of 192 =
  14. 14.Half of 112 =
  15. 15.Double 51 =
  16. 16.Double 32 =
  17. 17.Half of 178 =
  18. 18.Double 92 =
  19. 19.Double 46 =
  20. 20.Half of 148 =
  21. 21.Half of 46 =
  22. 22.Half of 198 =
  23. 23.Half of 136 =
  24. 24.Double 24 =
  25. 25.Half of 106 =
  26. 26.Double 73 =
  27. 27.Half of 132 =
  28. 28.Double 18 =
  29. 29.Double 23 =
  30. 30.Double 31 =
  31. 31.Double 94 =
  32. 32.Half of 58 =
  33. 33.Half of 172 =
  34. 34.Half of 128 =
  35. 35.Double 89 =
  36. 36.Half of 92 =
  37. 37.Half of 168 =
  38. 38.Half of 194 =
  39. 39.Half of 126 =
  40. 40.Double 17 =

Answer key

  1. 74
  2. 196
  3. 142
  4. 136
  5. 182
  6. 14
  7. 27
  8. 69
  9. 52
  10. 43
  11. 11
  12. 24
  13. 96
  14. 56
  15. 102
  16. 64
  17. 89
  18. 184
  19. 92
  20. 74
  21. 23
  22. 99
  23. 68
  24. 48
  25. 53
  26. 146
  27. 66
  28. 36
  29. 46
  30. 62
  31. 188
  32. 29
  33. 86
  34. 64
  35. 178
  36. 46
  37. 84
  38. 97
  39. 63
  40. 34

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