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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 986 · 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.Half of 112 =
  2. 2.Double 32 =
  3. 3.Double 55 =
  4. 4.Double 84 =
  5. 5.Double 68 =
  6. 6.Double 33 =
  7. 7.Double 51 =
  8. 8.Half of 114 =
  9. 9.Half of 26 =
  10. 10.Half of 128 =
  11. 11.Double 66 =
  12. 12.Half of 32 =
  13. 13.Double 11 =
  14. 14.Half of 138 =
  15. 15.Half of 172 =
  16. 16.Half of 142 =
  17. 17.Double 21 =
  18. 18.Half of 108 =
  19. 19.Half of 74 =
  20. 20.Half of 72 =
  21. 21.Half of 104 =
  22. 22.Half of 64 =
  23. 23.Half of 122 =
  24. 24.Half of 94 =
  25. 25.Half of 194 =
  26. 26.Half of 86 =
  27. 27.Half of 178 =
  28. 28.Half of 156 =
  29. 29.Half of 42 =
  30. 30.Half of 54 =
  31. 31.Half of 68 =
  32. 32.Double 24 =
  33. 33.Double 88 =
  34. 34.Double 35 =
  35. 35.Double 75 =
  36. 36.Half of 154 =
  37. 37.Half of 46 =
  38. 38.Double 27 =
  39. 39.Double 92 =
  40. 40.Half of 88 =

Answer key

  1. 56
  2. 64
  3. 110
  4. 168
  5. 136
  6. 66
  7. 102
  8. 57
  9. 13
  10. 64
  11. 132
  12. 16
  13. 22
  14. 69
  15. 86
  16. 71
  17. 42
  18. 54
  19. 37
  20. 36
  21. 52
  22. 32
  23. 61
  24. 47
  25. 97
  26. 43
  27. 89
  28. 78
  29. 21
  30. 27
  31. 34
  32. 48
  33. 176
  34. 70
  35. 150
  36. 77
  37. 23
  38. 54
  39. 184
  40. 44

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