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Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 344 · 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 120 =
  2. 2.Half of 48 =
  3. 3.Double 94 =
  4. 4.Half of 190 =
  5. 5.Double 22 =
  6. 6.Double 95 =
  7. 7.Double 18 =
  8. 8.Half of 36 =
  9. 9.Half of 128 =
  10. 10.Double 41 =
  11. 11.Half of 136 =
  12. 12.Half of 30 =
  13. 13.Half of 86 =
  14. 14.Double 29 =
  15. 15.Double 79 =
  16. 16.Double 72 =
  17. 17.Half of 124 =
  18. 18.Double 36 =
  19. 19.Half of 60 =
  20. 20.Double 71 =
  21. 21.Half of 44 =
  22. 22.Double 35 =
  23. 23.Half of 114 =
  24. 24.Double 39 =
  25. 25.Double 81 =
  26. 26.Double 44 =
  27. 27.Double 83 =
  28. 28.Half of 62 =
  29. 29.Half of 84 =
  30. 30.Double 34 =
  31. 31.Double 45 =
  32. 32.Double 23 =
  33. 33.Double 93 =
  34. 34.Double 24 =
  35. 35.Double 57 =
  36. 36.Half of 140 =
  37. 37.Half of 112 =
  38. 38.Half of 54 =
  39. 39.Half of 28 =
  40. 40.Half of 66 =

Answer key

  1. 60
  2. 24
  3. 188
  4. 95
  5. 44
  6. 190
  7. 36
  8. 18
  9. 64
  10. 82
  11. 68
  12. 15
  13. 43
  14. 58
  15. 158
  16. 144
  17. 62
  18. 72
  19. 30
  20. 142
  21. 22
  22. 70
  23. 57
  24. 78
  25. 162
  26. 88
  27. 166
  28. 31
  29. 42
  30. 68
  31. 90
  32. 46
  33. 186
  34. 48
  35. 114
  36. 70
  37. 56
  38. 27
  39. 14
  40. 33

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