← Doubling and halving lesson New set →

Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 168 · 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.Double 31 =
  2. 2.Half of 76 =
  3. 3.Half of 34 =
  4. 4.Double 29 =
  5. 5.Double 81 =
  6. 6.Half of 66 =
  7. 7.Double 41 =
  8. 8.Half of 176 =
  9. 9.Half of 170 =
  10. 10.Double 58 =
  11. 11.Double 45 =
  12. 12.Double 57 =
  13. 13.Double 33 =
  14. 14.Double 21 =
  15. 15.Double 39 =
  16. 16.Half of 186 =
  17. 17.Double 44 =
  18. 18.Double 46 =
  19. 19.Half of 100 =
  20. 20.Half of 70 =
  21. 21.Half of 102 =
  22. 22.Double 93 =
  23. 23.Double 48 =
  24. 24.Half of 142 =
  25. 25.Double 99 =
  26. 26.Double 71 =
  27. 27.Half of 44 =
  28. 28.Half of 90 =
  29. 29.Double 42 =
  30. 30.Double 32 =
  31. 31.Half of 40 =
  32. 32.Double 16 =
  33. 33.Double 17 =
  34. 34.Half of 28 =
  35. 35.Half of 118 =
  36. 36.Double 75 =
  37. 37.Double 38 =
  38. 38.Half of 124 =
  39. 39.Double 76 =
  40. 40.Double 52 =

Answer key

  1. 62
  2. 38
  3. 17
  4. 58
  5. 162
  6. 33
  7. 82
  8. 88
  9. 85
  10. 116
  11. 90
  12. 114
  13. 66
  14. 42
  15. 78
  16. 93
  17. 88
  18. 92
  19. 50
  20. 35
  21. 51
  22. 186
  23. 96
  24. 71
  25. 198
  26. 142
  27. 22
  28. 45
  29. 84
  30. 64
  31. 20
  32. 32
  33. 34
  34. 14
  35. 59
  36. 150
  37. 76
  38. 62
  39. 152
  40. 104

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths