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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 929 · 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 168 =
  2. 2.Double 85 =
  3. 3.Half of 52 =
  4. 4.Double 32 =
  5. 5.Double 68 =
  6. 6.Double 78 =
  7. 7.Double 43 =
  8. 8.Double 27 =
  9. 9.Half of 16 =
  10. 10.Double 91 =
  11. 11.Double 96 =
  12. 12.Half of 146 =
  13. 13.Double 74 =
  14. 14.Double 13 =
  15. 15.Double 44 =
  16. 16.Double 86 =
  17. 17.Double 34 =
  18. 18.Half of 176 =
  19. 19.Double 23 =
  20. 20.Half of 76 =
  21. 21.Half of 122 =
  22. 22.Double 89 =
  23. 23.Half of 32 =
  24. 24.Double 53 =
  25. 25.Double 54 =
  26. 26.Double 56 =
  27. 27.Half of 196 =
  28. 28.Half of 118 =
  29. 29.Double 49 =
  30. 30.Half of 22 =
  31. 31.Half of 38 =
  32. 32.Half of 112 =
  33. 33.Double 36 =
  34. 34.Half of 84 =
  35. 35.Half of 66 =
  36. 36.Double 65 =
  37. 37.Double 12 =
  38. 38.Double 21 =
  39. 39.Double 29 =
  40. 40.Double 31 =

Answer key

  1. 84
  2. 170
  3. 26
  4. 64
  5. 136
  6. 156
  7. 86
  8. 54
  9. 8
  10. 182
  11. 192
  12. 73
  13. 148
  14. 26
  15. 88
  16. 172
  17. 68
  18. 88
  19. 46
  20. 38
  21. 61
  22. 178
  23. 16
  24. 106
  25. 108
  26. 112
  27. 98
  28. 59
  29. 98
  30. 11
  31. 19
  32. 56
  33. 72
  34. 42
  35. 33
  36. 130
  37. 24
  38. 42
  39. 58
  40. 62

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