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Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 497 · 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 192 =
  2. 2.Half of 78 =
  3. 3.Half of 76 =
  4. 4.Half of 164 =
  5. 5.Double 51 =
  6. 6.Double 16 =
  7. 7.Double 52 =
  8. 8.Half of 66 =
  9. 9.Double 28 =
  10. 10.Half of 90 =
  11. 11.Half of 96 =
  12. 12.Half of 110 =
  13. 13.Double 39 =
  14. 14.Double 33 =
  15. 15.Half of 68 =
  16. 16.Double 86 =
  17. 17.Double 94 =
  18. 18.Double 54 =
  19. 19.Half of 194 =
  20. 20.Half of 106 =
  21. 21.Half of 60 =
  22. 22.Double 32 =
  23. 23.Double 98 =
  24. 24.Double 27 =
  25. 25.Half of 136 =
  26. 26.Half of 138 =
  27. 27.Double 26 =
  28. 28.Double 64 =
  29. 29.Half of 82 =
  30. 30.Double 67 =
  31. 31.Half of 130 =
  32. 32.Half of 64 =
  33. 33.Half of 62 =
  34. 34.Half of 54 =
  35. 35.Double 71 =
  36. 36.Double 57 =
  37. 37.Half of 56 =
  38. 38.Double 29 =
  39. 39.Half of 100 =
  40. 40.Double 77 =

Answer key

  1. 96
  2. 39
  3. 38
  4. 82
  5. 102
  6. 32
  7. 104
  8. 33
  9. 56
  10. 45
  11. 48
  12. 55
  13. 78
  14. 66
  15. 34
  16. 172
  17. 188
  18. 108
  19. 97
  20. 53
  21. 30
  22. 64
  23. 196
  24. 54
  25. 68
  26. 69
  27. 52
  28. 128
  29. 41
  30. 134
  31. 65
  32. 32
  33. 31
  34. 27
  35. 142
  36. 114
  37. 28
  38. 58
  39. 50
  40. 154

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