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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 33 · 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 39 =
  2. 2.Double 24 =
  3. 3.Half of 14 =
  4. 4.Double 41 =
  5. 5.Double 33 =
  6. 6.Half of 86 =
  7. 7.Half of 36 =
  8. 8.Double 58 =
  9. 9.Half of 148 =
  10. 10.Half of 102 =
  11. 11.Double 44 =
  12. 12.Half of 68 =
  13. 13.Half of 18 =
  14. 14.Half of 162 =
  15. 15.Half of 62 =
  16. 16.Half of 178 =
  17. 17.Half of 94 =
  18. 18.Double 45 =
  19. 19.Double 71 =
  20. 20.Half of 76 =
  21. 21.Double 12 =
  22. 22.Half of 112 =
  23. 23.Half of 34 =
  24. 24.Half of 114 =
  25. 25.Double 13 =
  26. 26.Double 38 =
  27. 27.Double 43 =
  28. 28.Half of 88 =
  29. 29.Double 62 =
  30. 30.Double 92 =
  31. 31.Half of 172 =
  32. 32.Double 15 =
  33. 33.Half of 136 =
  34. 34.Double 16 =
  35. 35.Double 91 =
  36. 36.Half of 78 =
  37. 37.Half of 168 =
  38. 38.Double 85 =
  39. 39.Half of 152 =
  40. 40.Half of 122 =

Answer key

  1. 78
  2. 48
  3. 7
  4. 82
  5. 66
  6. 43
  7. 18
  8. 116
  9. 74
  10. 51
  11. 88
  12. 34
  13. 9
  14. 81
  15. 31
  16. 89
  17. 47
  18. 90
  19. 142
  20. 38
  21. 24
  22. 56
  23. 17
  24. 57
  25. 26
  26. 76
  27. 86
  28. 44
  29. 124
  30. 184
  31. 86
  32. 30
  33. 68
  34. 32
  35. 182
  36. 39
  37. 84
  38. 170
  39. 76
  40. 61

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