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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 832 · 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 84 =
  2. 2.Half of 98 =
  3. 3.Double 26 =
  4. 4.Half of 72 =
  5. 5.Double 19 =
  6. 6.Half of 112 =
  7. 7.Half of 122 =
  8. 8.Double 21 =
  9. 9.Half of 14 =
  10. 10.Half of 16 =
  11. 11.Double 23 =
  12. 12.Half of 38 =
  13. 13.Double 47 =
  14. 14.Double 45 =
  15. 15.Double 71 =
  16. 16.Double 91 =
  17. 17.Double 74 =
  18. 18.Half of 48 =
  19. 19.Half of 26 =
  20. 20.Double 37 =
  21. 21.Half of 178 =
  22. 22.Double 29 =
  23. 23.Half of 126 =
  24. 24.Half of 22 =
  25. 25.Double 79 =
  26. 26.Double 76 =
  27. 27.Double 13 =
  28. 28.Half of 24 =
  29. 29.Half of 86 =
  30. 30.Double 98 =
  31. 31.Double 63 =
  32. 32.Double 51 =
  33. 33.Double 24 =
  34. 34.Double 86 =
  35. 35.Half of 134 =
  36. 36.Half of 28 =
  37. 37.Double 42 =
  38. 38.Double 35 =
  39. 39.Double 72 =
  40. 40.Half of 128 =

Answer key

  1. 168
  2. 49
  3. 52
  4. 36
  5. 38
  6. 56
  7. 61
  8. 42
  9. 7
  10. 8
  11. 46
  12. 19
  13. 94
  14. 90
  15. 142
  16. 182
  17. 148
  18. 24
  19. 13
  20. 74
  21. 89
  22. 58
  23. 63
  24. 11
  25. 158
  26. 152
  27. 26
  28. 12
  29. 43
  30. 196
  31. 126
  32. 102
  33. 48
  34. 172
  35. 67
  36. 14
  37. 84
  38. 70
  39. 144
  40. 64

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