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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 904 · 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 41 =
  2. 2.Double 21 =
  3. 3.Double 44 =
  4. 4.Half of 16 =
  5. 5.Double 56 =
  6. 6.Half of 44 =
  7. 7.Half of 52 =
  8. 8.Double 83 =
  9. 9.Double 87 =
  10. 10.Half of 56 =
  11. 11.Half of 128 =
  12. 12.Half of 198 =
  13. 13.Half of 68 =
  14. 14.Half of 104 =
  15. 15.Half of 92 =
  16. 16.Double 53 =
  17. 17.Half of 82 =
  18. 18.Double 91 =
  19. 19.Double 86 =
  20. 20.Double 62 =
  21. 21.Half of 54 =
  22. 22.Half of 64 =
  23. 23.Double 57 =
  24. 24.Half of 122 =
  25. 25.Half of 182 =
  26. 26.Double 23 =
  27. 27.Double 94 =
  28. 28.Half of 192 =
  29. 29.Half of 74 =
  30. 30.Half of 132 =
  31. 31.Double 85 =
  32. 32.Double 33 =
  33. 33.Double 58 =
  34. 34.Half of 22 =
  35. 35.Double 72 =
  36. 36.Double 17 =
  37. 37.Double 99 =
  38. 38.Half of 136 =
  39. 39.Half of 142 =
  40. 40.Half of 196 =

Answer key

  1. 82
  2. 42
  3. 88
  4. 8
  5. 112
  6. 22
  7. 26
  8. 166
  9. 174
  10. 28
  11. 64
  12. 99
  13. 34
  14. 52
  15. 46
  16. 106
  17. 41
  18. 182
  19. 172
  20. 124
  21. 27
  22. 32
  23. 114
  24. 61
  25. 91
  26. 46
  27. 188
  28. 96
  29. 37
  30. 66
  31. 170
  32. 66
  33. 116
  34. 11
  35. 144
  36. 34
  37. 198
  38. 68
  39. 71
  40. 98

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