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Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 812 · 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 94 =
  2. 2.Half of 148 =
  3. 3.Half of 44 =
  4. 4.Half of 174 =
  5. 5.Half of 26 =
  6. 6.Double 85 =
  7. 7.Half of 190 =
  8. 8.Double 97 =
  9. 9.Double 45 =
  10. 10.Half of 182 =
  11. 11.Half of 188 =
  12. 12.Double 33 =
  13. 13.Double 55 =
  14. 14.Half of 58 =
  15. 15.Double 24 =
  16. 16.Half of 170 =
  17. 17.Half of 34 =
  18. 18.Half of 120 =
  19. 19.Double 51 =
  20. 20.Double 25 =
  21. 21.Half of 50 =
  22. 22.Half of 96 =
  23. 23.Double 79 =
  24. 24.Double 58 =
  25. 25.Double 62 =
  26. 26.Half of 64 =
  27. 27.Double 38 =
  28. 28.Half of 86 =
  29. 29.Half of 146 =
  30. 30.Double 19 =
  31. 31.Double 72 =
  32. 32.Double 42 =
  33. 33.Double 89 =
  34. 34.Half of 56 =
  35. 35.Double 43 =
  36. 36.Double 56 =
  37. 37.Double 77 =
  38. 38.Half of 66 =
  39. 39.Double 96 =
  40. 40.Half of 84 =

Answer key

  1. 47
  2. 74
  3. 22
  4. 87
  5. 13
  6. 170
  7. 95
  8. 194
  9. 90
  10. 91
  11. 94
  12. 66
  13. 110
  14. 29
  15. 48
  16. 85
  17. 17
  18. 60
  19. 102
  20. 50
  21. 25
  22. 48
  23. 158
  24. 116
  25. 124
  26. 32
  27. 76
  28. 43
  29. 73
  30. 38
  31. 144
  32. 84
  33. 178
  34. 28
  35. 86
  36. 112
  37. 154
  38. 33
  39. 192
  40. 42

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