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Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 701 · 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 156 =
  2. 2.Half of 116 =
  3. 3.Double 58 =
  4. 4.Double 68 =
  5. 5.Half of 174 =
  6. 6.Double 84 =
  7. 7.Double 18 =
  8. 8.Double 19 =
  9. 9.Double 41 =
  10. 10.Half of 188 =
  11. 11.Half of 44 =
  12. 12.Double 45 =
  13. 13.Double 98 =
  14. 14.Half of 132 =
  15. 15.Double 29 =
  16. 16.Double 89 =
  17. 17.Double 69 =
  18. 18.Double 85 =
  19. 19.Half of 36 =
  20. 20.Double 81 =
  21. 21.Half of 26 =
  22. 22.Half of 84 =
  23. 23.Half of 112 =
  24. 24.Half of 106 =
  25. 25.Double 82 =
  26. 26.Double 34 =
  27. 27.Double 37 =
  28. 28.Half of 90 =
  29. 29.Double 47 =
  30. 30.Double 38 =
  31. 31.Double 32 =
  32. 32.Double 44 =
  33. 33.Half of 160 =
  34. 34.Double 99 =
  35. 35.Half of 120 =
  36. 36.Double 64 =
  37. 37.Double 42 =
  38. 38.Half of 118 =
  39. 39.Double 79 =
  40. 40.Half of 32 =

Answer key

  1. 78
  2. 58
  3. 116
  4. 136
  5. 87
  6. 168
  7. 36
  8. 38
  9. 82
  10. 94
  11. 22
  12. 90
  13. 196
  14. 66
  15. 58
  16. 178
  17. 138
  18. 170
  19. 18
  20. 162
  21. 13
  22. 42
  23. 56
  24. 53
  25. 164
  26. 68
  27. 74
  28. 45
  29. 94
  30. 76
  31. 64
  32. 88
  33. 80
  34. 198
  35. 60
  36. 128
  37. 84
  38. 59
  39. 158
  40. 16

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