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Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 379 · 40 questions
TalentJR

How to do it in your head (Split, then double or halve): To double: split into tens and ones, double both, add. To halve: split into an even number of tens and the rest (156 = 140 + 16). Halve both parts and add.

NameDateTime takenScore ___ / 40
  1. 1.Half of 194 =
  2. 2.Double 59 =
  3. 3.Half of 58 =
  4. 4.Double 18 =
  5. 5.Double 58 =
  6. 6.Half of 48 =
  7. 7.Double 41 =
  8. 8.Half of 74 =
  9. 9.Half of 178 =
  10. 10.Half of 152 =
  11. 11.Double 67 =
  12. 12.Double 69 =
  13. 13.Double 86 =
  14. 14.Half of 96 =
  15. 15.Half of 30 =
  16. 16.Half of 172 =
  17. 17.Double 83 =
  18. 18.Half of 44 =
  19. 19.Half of 80 =
  20. 20.Double 51 =
  21. 21.Half of 160 =
  22. 22.Double 31 =
  23. 23.Double 53 =
  24. 24.Half of 170 =
  25. 25.Double 24 =
  26. 26.Double 36 =
  27. 27.Double 63 =
  28. 28.Double 27 =
  29. 29.Double 38 =
  30. 30.Double 25 =
  31. 31.Half of 54 =
  32. 32.Half of 84 =
  33. 33.Double 29 =
  34. 34.Double 84 =
  35. 35.Double 21 =
  36. 36.Half of 66 =
  37. 37.Half of 28 =
  38. 38.Half of 40 =
  39. 39.Half of 184 =
  40. 40.Double 22 =

Answer key

  1. 97
  2. 118
  3. 29
  4. 36
  5. 116
  6. 24
  7. 82
  8. 37
  9. 89
  10. 76
  11. 134
  12. 138
  13. 172
  14. 48
  15. 15
  16. 86
  17. 166
  18. 22
  19. 40
  20. 102
  21. 80
  22. 62
  23. 106
  24. 85
  25. 48
  26. 72
  27. 126
  28. 54
  29. 76
  30. 50
  31. 27
  32. 42
  33. 58
  34. 168
  35. 42
  36. 33
  37. 14
  38. 20
  39. 92
  40. 44

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