← Doubling and halving lesson New set →

Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 522 · 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 192 =
  2. 2.Half of 184 =
  3. 3.Half of 112 =
  4. 4.Half of 132 =
  5. 5.Double 51 =
  6. 6.Half of 166 =
  7. 7.Double 87 =
  8. 8.Double 22 =
  9. 9.Half of 190 =
  10. 10.Double 55 =
  11. 11.Half of 68 =
  12. 12.Double 77 =
  13. 13.Double 43 =
  14. 14.Half of 88 =
  15. 15.Double 56 =
  16. 16.Half of 34 =
  17. 17.Half of 126 =
  18. 18.Double 32 =
  19. 19.Double 88 =
  20. 20.Half of 70 =
  21. 21.Double 99 =
  22. 22.Half of 116 =
  23. 23.Double 27 =
  24. 24.Double 52 =
  25. 25.Half of 122 =
  26. 26.Half of 180 =
  27. 27.Half of 60 =
  28. 28.Half of 72 =
  29. 29.Half of 42 =
  30. 30.Double 26 =
  31. 31.Half of 82 =
  32. 32.Half of 176 =
  33. 33.Double 71 =
  34. 34.Double 21 =
  35. 35.Double 23 =
  36. 36.Half of 160 =
  37. 37.Half of 64 =
  38. 38.Double 67 =
  39. 39.Double 46 =
  40. 40.Half of 188 =

Answer key

  1. 96
  2. 92
  3. 56
  4. 66
  5. 102
  6. 83
  7. 174
  8. 44
  9. 95
  10. 110
  11. 34
  12. 154
  13. 86
  14. 44
  15. 112
  16. 17
  17. 63
  18. 64
  19. 176
  20. 35
  21. 198
  22. 58
  23. 54
  24. 104
  25. 61
  26. 90
  27. 30
  28. 36
  29. 21
  30. 52
  31. 41
  32. 88
  33. 142
  34. 42
  35. 46
  36. 80
  37. 32
  38. 134
  39. 92
  40. 94

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