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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 943 · 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 87 =
  2. 2.Half of 162 =
  3. 3.Half of 74 =
  4. 4.Half of 16 =
  5. 5.Double 37 =
  6. 6.Half of 182 =
  7. 7.Double 35 =
  8. 8.Half of 86 =
  9. 9.Double 18 =
  10. 10.Double 51 =
  11. 11.Half of 14 =
  12. 12.Half of 126 =
  13. 13.Double 33 =
  14. 14.Double 69 =
  15. 15.Double 39 =
  16. 16.Double 91 =
  17. 17.Half of 194 =
  18. 18.Half of 22 =
  19. 19.Half of 178 =
  20. 20.Half of 78 =
  21. 21.Double 53 =
  22. 22.Double 65 =
  23. 23.Half of 36 =
  24. 24.Double 98 =
  25. 25.Half of 172 =
  26. 26.Double 73 =
  27. 27.Half of 42 =
  28. 28.Half of 116 =
  29. 29.Double 54 =
  30. 30.Double 21 =
  31. 31.Double 78 =
  32. 32.Half of 158 =
  33. 33.Double 61 =
  34. 34.Half of 48 =
  35. 35.Double 96 =
  36. 36.Double 92 =
  37. 37.Half of 54 =
  38. 38.Half of 98 =
  39. 39.Half of 112 =
  40. 40.Half of 152 =

Answer key

  1. 174
  2. 81
  3. 37
  4. 8
  5. 74
  6. 91
  7. 70
  8. 43
  9. 36
  10. 102
  11. 7
  12. 63
  13. 66
  14. 138
  15. 78
  16. 182
  17. 97
  18. 11
  19. 89
  20. 39
  21. 106
  22. 130
  23. 18
  24. 196
  25. 86
  26. 146
  27. 21
  28. 58
  29. 108
  30. 42
  31. 156
  32. 79
  33. 122
  34. 24
  35. 192
  36. 184
  37. 27
  38. 49
  39. 56
  40. 76

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