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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 29 · 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 19 =
  2. 2.Double 53 =
  3. 3.Double 61 =
  4. 4.Half of 156 =
  5. 5.Half of 146 =
  6. 6.Half of 46 =
  7. 7.Half of 22 =
  8. 8.Double 94 =
  9. 9.Half of 78 =
  10. 10.Double 33 =
  11. 11.Double 85 =
  12. 12.Half of 36 =
  13. 13.Half of 148 =
  14. 14.Double 64 =
  15. 15.Half of 52 =
  16. 16.Double 63 =
  17. 17.Half of 178 =
  18. 18.Double 73 =
  19. 19.Half of 14 =
  20. 20.Double 22 =
  21. 21.Double 69 =
  22. 22.Double 88 =
  23. 23.Half of 56 =
  24. 24.Half of 102 =
  25. 25.Double 24 =
  26. 26.Double 17 =
  27. 27.Double 18 =
  28. 28.Double 99 =
  29. 29.Double 23 =
  30. 30.Double 34 =
  31. 31.Half of 82 =
  32. 32.Half of 84 =
  33. 33.Double 71 =
  34. 34.Half of 124 =
  35. 35.Double 91 =
  36. 36.Double 75 =
  37. 37.Double 21 =
  38. 38.Double 11 =
  39. 39.Double 82 =
  40. 40.Double 68 =

Answer key

  1. 38
  2. 106
  3. 122
  4. 78
  5. 73
  6. 23
  7. 11
  8. 188
  9. 39
  10. 66
  11. 170
  12. 18
  13. 74
  14. 128
  15. 26
  16. 126
  17. 89
  18. 146
  19. 7
  20. 44
  21. 138
  22. 176
  23. 28
  24. 51
  25. 48
  26. 34
  27. 36
  28. 198
  29. 46
  30. 68
  31. 41
  32. 42
  33. 142
  34. 62
  35. 182
  36. 150
  37. 42
  38. 22
  39. 164
  40. 136

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