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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 667 · 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 89 =
  2. 2.Half of 142 =
  3. 3.Half of 32 =
  4. 4.Double 75 =
  5. 5.Double 64 =
  6. 6.Double 65 =
  7. 7.Double 13 =
  8. 8.Double 55 =
  9. 9.Double 35 =
  10. 10.Half of 16 =
  11. 11.Half of 132 =
  12. 12.Double 15 =
  13. 13.Double 91 =
  14. 14.Double 73 =
  15. 15.Double 12 =
  16. 16.Double 84 =
  17. 17.Double 85 =
  18. 18.Double 88 =
  19. 19.Double 63 =
  20. 20.Double 61 =
  21. 21.Double 81 =
  22. 22.Double 31 =
  23. 23.Half of 136 =
  24. 24.Double 45 =
  25. 25.Double 56 =
  26. 26.Half of 176 =
  27. 27.Half of 76 =
  28. 28.Double 34 =
  29. 29.Double 54 =
  30. 30.Double 96 =
  31. 31.Half of 146 =
  32. 32.Double 62 =
  33. 33.Double 57 =
  34. 34.Double 72 =
  35. 35.Double 32 =
  36. 36.Double 86 =
  37. 37.Half of 178 =
  38. 38.Half of 82 =
  39. 39.Double 69 =
  40. 40.Half of 128 =

Answer key

  1. 178
  2. 71
  3. 16
  4. 150
  5. 128
  6. 130
  7. 26
  8. 110
  9. 70
  10. 8
  11. 66
  12. 30
  13. 182
  14. 146
  15. 24
  16. 168
  17. 170
  18. 176
  19. 126
  20. 122
  21. 162
  22. 62
  23. 68
  24. 90
  25. 112
  26. 88
  27. 38
  28. 68
  29. 108
  30. 192
  31. 73
  32. 124
  33. 114
  34. 144
  35. 64
  36. 172
  37. 89
  38. 41
  39. 138
  40. 64

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