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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 918 · 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 23 =
  2. 2.Half of 172 =
  3. 3.Half of 168 =
  4. 4.Half of 116 =
  5. 5.Half of 144 =
  6. 6.Double 44 =
  7. 7.Double 33 =
  8. 8.Double 86 =
  9. 9.Double 27 =
  10. 10.Double 53 =
  11. 11.Double 36 =
  12. 12.Half of 148 =
  13. 13.Half of 146 =
  14. 14.Double 59 =
  15. 15.Half of 62 =
  16. 16.Half of 122 =
  17. 17.Double 98 =
  18. 18.Double 81 =
  19. 19.Half of 52 =
  20. 20.Half of 92 =
  21. 21.Double 84 =
  22. 22.Double 24 =
  23. 23.Half of 26 =
  24. 24.Double 82 =
  25. 25.Double 34 =
  26. 26.Half of 44 =
  27. 27.Double 41 =
  28. 28.Double 73 =
  29. 29.Double 89 =
  30. 30.Double 31 =
  31. 31.Half of 142 =
  32. 32.Half of 22 =
  33. 33.Half of 192 =
  34. 34.Double 69 =
  35. 35.Double 21 =
  36. 36.Half of 28 =
  37. 37.Half of 182 =
  38. 38.Half of 164 =
  39. 39.Double 63 =
  40. 40.Half of 12 =

Answer key

  1. 46
  2. 86
  3. 84
  4. 58
  5. 72
  6. 88
  7. 66
  8. 172
  9. 54
  10. 106
  11. 72
  12. 74
  13. 73
  14. 118
  15. 31
  16. 61
  17. 196
  18. 162
  19. 26
  20. 46
  21. 168
  22. 48
  23. 13
  24. 164
  25. 68
  26. 22
  27. 82
  28. 146
  29. 178
  30. 62
  31. 71
  32. 11
  33. 96
  34. 138
  35. 42
  36. 14
  37. 91
  38. 82
  39. 126
  40. 6

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