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Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 449 · 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 82 =
  2. 2.Double 27 =
  3. 3.Half of 192 =
  4. 4.Double 31 =
  5. 5.Half of 68 =
  6. 6.Double 68 =
  7. 7.Half of 154 =
  8. 8.Half of 168 =
  9. 9.Double 39 =
  10. 10.Double 65 =
  11. 11.Double 48 =
  12. 12.Half of 84 =
  13. 13.Half of 90 =
  14. 14.Half of 32 =
  15. 15.Half of 50 =
  16. 16.Half of 122 =
  17. 17.Double 55 =
  18. 18.Half of 194 =
  19. 19.Half of 180 =
  20. 20.Double 58 =
  21. 21.Double 52 =
  22. 22.Half of 34 =
  23. 23.Double 64 =
  24. 24.Double 73 =
  25. 25.Half of 76 =
  26. 26.Half of 42 =
  27. 27.Double 93 =
  28. 28.Double 37 =
  29. 29.Double 35 =
  30. 30.Double 88 =
  31. 31.Half of 74 =
  32. 32.Double 34 =
  33. 33.Double 16 =
  34. 34.Double 19 =
  35. 35.Half of 108 =
  36. 36.Half of 96 =
  37. 37.Double 91 =
  38. 38.Double 87 =
  39. 39.Half of 56 =
  40. 40.Half of 162 =

Answer key

  1. 41
  2. 54
  3. 96
  4. 62
  5. 34
  6. 136
  7. 77
  8. 84
  9. 78
  10. 130
  11. 96
  12. 42
  13. 45
  14. 16
  15. 25
  16. 61
  17. 110
  18. 97
  19. 90
  20. 116
  21. 104
  22. 17
  23. 128
  24. 146
  25. 38
  26. 21
  27. 186
  28. 74
  29. 70
  30. 176
  31. 37
  32. 68
  33. 32
  34. 38
  35. 54
  36. 48
  37. 182
  38. 174
  39. 28
  40. 81

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