← Doubling and halving lesson New set →

Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 278 · 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 158 =
  2. 2.Half of 126 =
  3. 3.Half of 50 =
  4. 4.Double 88 =
  5. 5.Half of 96 =
  6. 6.Double 81 =
  7. 7.Half of 196 =
  8. 8.Half of 92 =
  9. 9.Double 55 =
  10. 10.Double 82 =
  11. 11.Double 91 =
  12. 12.Double 22 =
  13. 13.Half of 150 =
  14. 14.Half of 168 =
  15. 15.Double 27 =
  16. 16.Half of 114 =
  17. 17.Double 49 =
  18. 18.Double 29 =
  19. 19.Double 67 =
  20. 20.Double 94 =
  21. 21.Double 71 =
  22. 22.Double 61 =
  23. 23.Half of 66 =
  24. 24.Double 24 =
  25. 25.Half of 70 =
  26. 26.Half of 188 =
  27. 27.Half of 64 =
  28. 28.Half of 86 =
  29. 29.Double 77 =
  30. 30.Half of 56 =
  31. 31.Half of 162 =
  32. 32.Double 47 =
  33. 33.Double 78 =
  34. 34.Half of 112 =
  35. 35.Double 41 =
  36. 36.Half of 102 =
  37. 37.Double 79 =
  38. 38.Double 98 =
  39. 39.Half of 180 =
  40. 40.Double 72 =

Answer key

  1. 79
  2. 63
  3. 25
  4. 176
  5. 48
  6. 162
  7. 98
  8. 46
  9. 110
  10. 164
  11. 182
  12. 44
  13. 75
  14. 84
  15. 54
  16. 57
  17. 98
  18. 58
  19. 134
  20. 188
  21. 142
  22. 122
  23. 33
  24. 48
  25. 35
  26. 94
  27. 32
  28. 43
  29. 154
  30. 28
  31. 81
  32. 94
  33. 156
  34. 56
  35. 82
  36. 51
  37. 158
  38. 196
  39. 90
  40. 144

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