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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 919 · 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 26 =
  2. 2.Half of 42 =
  3. 3.Double 31 =
  4. 4.Double 94 =
  5. 5.Half of 152 =
  6. 6.Double 61 =
  7. 7.Half of 156 =
  8. 8.Half of 68 =
  9. 9.Double 96 =
  10. 10.Double 23 =
  11. 11.Double 12 =
  12. 12.Double 95 =
  13. 13.Half of 88 =
  14. 14.Double 66 =
  15. 15.Half of 138 =
  16. 16.Double 29 =
  17. 17.Double 19 =
  18. 18.Half of 186 =
  19. 19.Double 74 =
  20. 20.Double 87 =
  21. 21.Double 58 =
  22. 22.Double 84 =
  23. 23.Double 55 =
  24. 24.Double 45 =
  25. 25.Double 16 =
  26. 26.Half of 118 =
  27. 27.Double 86 =
  28. 28.Double 44 =
  29. 29.Half of 38 =
  30. 30.Half of 198 =
  31. 31.Half of 136 =
  32. 32.Half of 154 =
  33. 33.Double 15 =
  34. 34.Half of 108 =
  35. 35.Double 41 =
  36. 36.Half of 104 =
  37. 37.Half of 122 =
  38. 38.Half of 16 =
  39. 39.Double 53 =
  40. 40.Half of 144 =

Answer key

  1. 52
  2. 21
  3. 62
  4. 188
  5. 76
  6. 122
  7. 78
  8. 34
  9. 192
  10. 46
  11. 24
  12. 190
  13. 44
  14. 132
  15. 69
  16. 58
  17. 38
  18. 93
  19. 148
  20. 174
  21. 116
  22. 168
  23. 110
  24. 90
  25. 32
  26. 59
  27. 172
  28. 88
  29. 19
  30. 99
  31. 68
  32. 77
  33. 30
  34. 54
  35. 82
  36. 52
  37. 61
  38. 8
  39. 106
  40. 72

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