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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 897 · 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 76 =
  2. 2.Double 92 =
  3. 3.Double 89 =
  4. 4.Half of 62 =
  5. 5.Double 28 =
  6. 6.Double 84 =
  7. 7.Double 99 =
  8. 8.Double 32 =
  9. 9.Double 64 =
  10. 10.Double 31 =
  11. 11.Half of 64 =
  12. 12.Double 12 =
  13. 13.Half of 132 =
  14. 14.Half of 182 =
  15. 15.Half of 118 =
  16. 16.Double 46 =
  17. 17.Double 73 =
  18. 18.Double 26 =
  19. 19.Double 42 =
  20. 20.Double 74 =
  21. 21.Double 86 =
  22. 22.Half of 16 =
  23. 23.Double 71 =
  24. 24.Half of 124 =
  25. 25.Double 13 =
  26. 26.Half of 178 =
  27. 27.Double 17 =
  28. 28.Double 58 =
  29. 29.Half of 158 =
  30. 30.Double 19 =
  31. 31.Half of 172 =
  32. 32.Half of 154 =
  33. 33.Half of 106 =
  34. 34.Double 59 =
  35. 35.Double 54 =
  36. 36.Double 94 =
  37. 37.Half of 14 =
  38. 38.Half of 36 =
  39. 39.Double 51 =
  40. 40.Half of 84 =

Answer key

  1. 152
  2. 184
  3. 178
  4. 31
  5. 56
  6. 168
  7. 198
  8. 64
  9. 128
  10. 62
  11. 32
  12. 24
  13. 66
  14. 91
  15. 59
  16. 92
  17. 146
  18. 52
  19. 84
  20. 148
  21. 172
  22. 8
  23. 142
  24. 62
  25. 26
  26. 89
  27. 34
  28. 116
  29. 79
  30. 38
  31. 86
  32. 77
  33. 53
  34. 118
  35. 108
  36. 188
  37. 7
  38. 18
  39. 102
  40. 42

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