← Doubling and halving lesson New set →

Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 84 · 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 53 =
  2. 2.Half of 114 =
  3. 3.Half of 198 =
  4. 4.Half of 72 =
  5. 5.Double 31 =
  6. 6.Half of 120 =
  7. 7.Double 74 =
  8. 8.Half of 34 =
  9. 9.Double 17 =
  10. 10.Double 91 =
  11. 11.Double 93 =
  12. 12.Double 97 =
  13. 13.Double 39 =
  14. 14.Half of 178 =
  15. 15.Half of 194 =
  16. 16.Half of 138 =
  17. 17.Double 42 =
  18. 18.Double 71 =
  19. 19.Half of 136 =
  20. 20.Double 24 =
  21. 21.Double 23 =
  22. 22.Half of 46 =
  23. 23.Half of 166 =
  24. 24.Double 52 =
  25. 25.Double 96 =
  26. 26.Half of 154 =
  27. 27.Double 58 =
  28. 28.Half of 156 =
  29. 29.Double 25 =
  30. 30.Half of 48 =
  31. 31.Double 76 =
  32. 32.Half of 108 =
  33. 33.Half of 164 =
  34. 34.Half of 30 =
  35. 35.Half of 76 =
  36. 36.Half of 62 =
  37. 37.Half of 98 =
  38. 38.Half of 188 =
  39. 39.Half of 52 =
  40. 40.Double 72 =

Answer key

  1. 106
  2. 57
  3. 99
  4. 36
  5. 62
  6. 60
  7. 148
  8. 17
  9. 34
  10. 182
  11. 186
  12. 194
  13. 78
  14. 89
  15. 97
  16. 69
  17. 84
  18. 142
  19. 68
  20. 48
  21. 46
  22. 23
  23. 83
  24. 104
  25. 192
  26. 77
  27. 116
  28. 78
  29. 50
  30. 24
  31. 152
  32. 54
  33. 82
  34. 15
  35. 38
  36. 31
  37. 49
  38. 94
  39. 26
  40. 144

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