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Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 733 · 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 66 =
  2. 2.Double 44 =
  3. 3.Half of 62 =
  4. 4.Half of 118 =
  5. 5.Double 51 =
  6. 6.Double 61 =
  7. 7.Double 66 =
  8. 8.Double 81 =
  9. 9.Half of 158 =
  10. 10.Double 68 =
  11. 11.Half of 32 =
  12. 12.Double 97 =
  13. 13.Half of 186 =
  14. 14.Half of 68 =
  15. 15.Double 49 =
  16. 16.Double 58 =
  17. 17.Double 93 =
  18. 18.Half of 36 =
  19. 19.Half of 162 =
  20. 20.Double 27 =
  21. 21.Half of 138 =
  22. 22.Double 62 =
  23. 23.Double 32 =
  24. 24.Double 22 =
  25. 25.Double 39 =
  26. 26.Half of 134 =
  27. 27.Double 46 =
  28. 28.Double 53 =
  29. 29.Double 37 =
  30. 30.Double 24 =
  31. 31.Half of 136 =
  32. 32.Double 26 =
  33. 33.Half of 60 =
  34. 34.Half of 132 =
  35. 35.Double 18 =
  36. 36.Half of 104 =
  37. 37.Double 55 =
  38. 38.Half of 94 =
  39. 39.Half of 72 =
  40. 40.Double 31 =

Answer key

  1. 33
  2. 88
  3. 31
  4. 59
  5. 102
  6. 122
  7. 132
  8. 162
  9. 79
  10. 136
  11. 16
  12. 194
  13. 93
  14. 34
  15. 98
  16. 116
  17. 186
  18. 18
  19. 81
  20. 54
  21. 69
  22. 124
  23. 64
  24. 44
  25. 78
  26. 67
  27. 92
  28. 106
  29. 74
  30. 48
  31. 68
  32. 52
  33. 30
  34. 66
  35. 36
  36. 52
  37. 110
  38. 47
  39. 36
  40. 62

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