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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 967 · 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 31 =
  2. 2.Double 29 =
  3. 3.Double 21 =
  4. 4.Double 44 =
  5. 5.Double 68 =
  6. 6.Double 22 =
  7. 7.Double 28 =
  8. 8.Half of 156 =
  9. 9.Double 69 =
  10. 10.Double 24 =
  11. 11.Double 77 =
  12. 12.Double 86 =
  13. 13.Half of 102 =
  14. 14.Double 26 =
  15. 15.Half of 86 =
  16. 16.Double 13 =
  17. 17.Half of 48 =
  18. 18.Double 71 =
  19. 19.Half of 76 =
  20. 20.Half of 16 =
  21. 21.Double 42 =
  22. 22.Half of 144 =
  23. 23.Half of 122 =
  24. 24.Double 51 =
  25. 25.Half of 52 =
  26. 26.Double 94 =
  27. 27.Double 49 =
  28. 28.Half of 62 =
  29. 29.Half of 178 =
  30. 30.Double 23 =
  31. 31.Double 11 =
  32. 32.Double 18 =
  33. 33.Double 37 =
  34. 34.Double 52 =
  35. 35.Half of 152 =
  36. 36.Half of 146 =
  37. 37.Half of 28 =
  38. 38.Half of 172 =
  39. 39.Half of 12 =
  40. 40.Double 12 =

Answer key

  1. 62
  2. 58
  3. 42
  4. 88
  5. 136
  6. 44
  7. 56
  8. 78
  9. 138
  10. 48
  11. 154
  12. 172
  13. 51
  14. 52
  15. 43
  16. 26
  17. 24
  18. 142
  19. 38
  20. 8
  21. 84
  22. 72
  23. 61
  24. 102
  25. 26
  26. 188
  27. 98
  28. 31
  29. 89
  30. 46
  31. 22
  32. 36
  33. 74
  34. 104
  35. 76
  36. 73
  37. 14
  38. 86
  39. 6
  40. 24

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