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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 479 · 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 34 =
  2. 2.Half of 174 =
  3. 3.Half of 124 =
  4. 4.Half of 152 =
  5. 5.Half of 122 =
  6. 6.Half of 34 =
  7. 7.Double 76 =
  8. 8.Double 22 =
  9. 9.Double 14 =
  10. 10.Double 31 =
  11. 11.Half of 48 =
  12. 12.Half of 32 =
  13. 13.Double 19 =
  14. 14.Double 17 =
  15. 15.Double 42 =
  16. 16.Double 52 =
  17. 17.Double 66 =
  18. 18.Half of 72 =
  19. 19.Half of 62 =
  20. 20.Double 81 =
  21. 21.Half of 38 =
  22. 22.Half of 52 =
  23. 23.Half of 88 =
  24. 24.Double 43 =
  25. 25.Double 88 =
  26. 26.Half of 112 =
  27. 27.Half of 126 =
  28. 28.Half of 86 =
  29. 29.Double 47 =
  30. 30.Double 29 =
  31. 31.Half of 158 =
  32. 32.Half of 106 =
  33. 33.Half of 142 =
  34. 34.Half of 166 =
  35. 35.Half of 118 =
  36. 36.Double 65 =
  37. 37.Double 64 =
  38. 38.Half of 92 =
  39. 39.Half of 84 =
  40. 40.Double 23 =

Answer key

  1. 68
  2. 87
  3. 62
  4. 76
  5. 61
  6. 17
  7. 152
  8. 44
  9. 28
  10. 62
  11. 24
  12. 16
  13. 38
  14. 34
  15. 84
  16. 104
  17. 132
  18. 36
  19. 31
  20. 162
  21. 19
  22. 26
  23. 44
  24. 86
  25. 176
  26. 56
  27. 63
  28. 43
  29. 94
  30. 58
  31. 79
  32. 53
  33. 71
  34. 83
  35. 59
  36. 130
  37. 128
  38. 46
  39. 42
  40. 46

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