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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 936 · 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 29 =
  2. 2.Double 69 =
  3. 3.Double 58 =
  4. 4.Half of 124 =
  5. 5.Half of 98 =
  6. 6.Half of 132 =
  7. 7.Double 72 =
  8. 8.Half of 186 =
  9. 9.Half of 182 =
  10. 10.Half of 152 =
  11. 11.Half of 108 =
  12. 12.Half of 172 =
  13. 13.Double 79 =
  14. 14.Double 88 =
  15. 15.Double 62 =
  16. 16.Double 17 =
  17. 17.Double 83 =
  18. 18.Half of 112 =
  19. 19.Half of 154 =
  20. 20.Double 36 =
  21. 21.Double 97 =
  22. 22.Half of 122 =
  23. 23.Half of 188 =
  24. 24.Double 91 =
  25. 25.Half of 92 =
  26. 26.Double 66 =
  27. 27.Double 14 =
  28. 28.Half of 136 =
  29. 29.Double 45 =
  30. 30.Double 73 =
  31. 31.Double 52 =
  32. 32.Half of 38 =
  33. 33.Half of 146 =
  34. 34.Half of 22 =
  35. 35.Double 92 =
  36. 36.Double 23 =
  37. 37.Double 99 =
  38. 38.Half of 56 =
  39. 39.Double 12 =
  40. 40.Half of 44 =

Answer key

  1. 58
  2. 138
  3. 116
  4. 62
  5. 49
  6. 66
  7. 144
  8. 93
  9. 91
  10. 76
  11. 54
  12. 86
  13. 158
  14. 176
  15. 124
  16. 34
  17. 166
  18. 56
  19. 77
  20. 72
  21. 194
  22. 61
  23. 94
  24. 182
  25. 46
  26. 132
  27. 28
  28. 68
  29. 90
  30. 146
  31. 104
  32. 19
  33. 73
  34. 11
  35. 184
  36. 46
  37. 198
  38. 28
  39. 24
  40. 22

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