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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 987 · 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 88 =
  2. 2.Double 18 =
  3. 3.Double 96 =
  4. 4.Half of 72 =
  5. 5.Half of 32 =
  6. 6.Half of 116 =
  7. 7.Double 71 =
  8. 8.Double 21 =
  9. 9.Half of 52 =
  10. 10.Double 26 =
  11. 11.Half of 62 =
  12. 12.Double 44 =
  13. 13.Half of 142 =
  14. 14.Half of 178 =
  15. 15.Double 76 =
  16. 16.Half of 42 =
  17. 17.Double 22 =
  18. 18.Half of 22 =
  19. 19.Half of 38 =
  20. 20.Double 46 =
  21. 21.Double 13 =
  22. 22.Double 23 =
  23. 23.Half of 196 =
  24. 24.Half of 104 =
  25. 25.Half of 118 =
  26. 26.Double 39 =
  27. 27.Half of 192 =
  28. 28.Double 99 =
  29. 29.Half of 174 =
  30. 30.Half of 126 =
  31. 31.Half of 86 =
  32. 32.Half of 122 =
  33. 33.Half of 102 =
  34. 34.Double 19 =
  35. 35.Half of 48 =
  36. 36.Double 56 =
  37. 37.Double 61 =
  38. 38.Double 49 =
  39. 39.Half of 146 =
  40. 40.Double 32 =

Answer key

  1. 176
  2. 36
  3. 192
  4. 36
  5. 16
  6. 58
  7. 142
  8. 42
  9. 26
  10. 52
  11. 31
  12. 88
  13. 71
  14. 89
  15. 152
  16. 21
  17. 44
  18. 11
  19. 19
  20. 92
  21. 26
  22. 46
  23. 98
  24. 52
  25. 59
  26. 78
  27. 96
  28. 198
  29. 87
  30. 63
  31. 43
  32. 61
  33. 51
  34. 38
  35. 24
  36. 112
  37. 122
  38. 98
  39. 73
  40. 64

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