← Doubling and halving lesson New set →

Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 264 · 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 156 =
  2. 2.Half of 56 =
  3. 3.Double 68 =
  4. 4.Double 41 =
  5. 5.Half of 190 =
  6. 6.Half of 68 =
  7. 7.Half of 114 =
  8. 8.Double 65 =
  9. 9.Half of 176 =
  10. 10.Double 63 =
  11. 11.Double 69 =
  12. 12.Double 62 =
  13. 13.Double 66 =
  14. 14.Half of 130 =
  15. 15.Half of 162 =
  16. 16.Double 61 =
  17. 17.Half of 88 =
  18. 18.Half of 180 =
  19. 19.Double 28 =
  20. 20.Half of 138 =
  21. 21.Double 95 =
  22. 22.Half of 188 =
  23. 23.Half of 148 =
  24. 24.Half of 108 =
  25. 25.Double 91 =
  26. 26.Double 43 =
  27. 27.Double 76 =
  28. 28.Double 72 =
  29. 29.Double 27 =
  30. 30.Double 58 =
  31. 31.Double 82 =
  32. 32.Half of 168 =
  33. 33.Half of 152 =
  34. 34.Half of 172 =
  35. 35.Double 71 =
  36. 36.Half of 134 =
  37. 37.Half of 154 =
  38. 38.Half of 100 =
  39. 39.Double 24 =
  40. 40.Half of 70 =

Answer key

  1. 78
  2. 28
  3. 136
  4. 82
  5. 95
  6. 34
  7. 57
  8. 130
  9. 88
  10. 126
  11. 138
  12. 124
  13. 132
  14. 65
  15. 81
  16. 122
  17. 44
  18. 90
  19. 56
  20. 69
  21. 190
  22. 94
  23. 74
  24. 54
  25. 182
  26. 86
  27. 152
  28. 144
  29. 54
  30. 116
  31. 164
  32. 84
  33. 76
  34. 86
  35. 142
  36. 67
  37. 77
  38. 50
  39. 48
  40. 35

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