← Doubling and halving lesson New set →

Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 552 · 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 122 =
  2. 2.Double 59 =
  3. 3.Double 78 =
  4. 4.Double 38 =
  5. 5.Half of 174 =
  6. 6.Double 16 =
  7. 7.Half of 196 =
  8. 8.Half of 46 =
  9. 9.Half of 52 =
  10. 10.Half of 184 =
  11. 11.Double 31 =
  12. 12.Half of 166 =
  13. 13.Half of 168 =
  14. 14.Half of 154 =
  15. 15.Double 92 =
  16. 16.Half of 62 =
  17. 17.Double 83 =
  18. 18.Half of 26 =
  19. 19.Half of 38 =
  20. 20.Double 43 =
  21. 21.Double 77 =
  22. 22.Double 36 =
  23. 23.Double 88 =
  24. 24.Half of 60 =
  25. 25.Double 33 =
  26. 26.Double 71 =
  27. 27.Half of 112 =
  28. 28.Half of 58 =
  29. 29.Double 97 =
  30. 30.Double 72 =
  31. 31.Half of 104 =
  32. 32.Double 98 =
  33. 33.Double 81 =
  34. 34.Double 94 =
  35. 35.Double 21 =
  36. 36.Double 46 =
  37. 37.Double 53 =
  38. 38.Double 29 =
  39. 39.Half of 78 =
  40. 40.Half of 188 =

Answer key

  1. 61
  2. 118
  3. 156
  4. 76
  5. 87
  6. 32
  7. 98
  8. 23
  9. 26
  10. 92
  11. 62
  12. 83
  13. 84
  14. 77
  15. 184
  16. 31
  17. 166
  18. 13
  19. 19
  20. 86
  21. 154
  22. 72
  23. 176
  24. 30
  25. 66
  26. 142
  27. 56
  28. 29
  29. 194
  30. 144
  31. 52
  32. 196
  33. 162
  34. 188
  35. 42
  36. 92
  37. 106
  38. 58
  39. 39
  40. 94

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