← Doubling and halving lesson New set →

Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 362 · 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 62 =
  2. 2.Double 43 =
  3. 3.Half of 44 =
  4. 4.Double 55 =
  5. 5.Double 71 =
  6. 6.Double 61 =
  7. 7.Double 67 =
  8. 8.Double 81 =
  9. 9.Half of 72 =
  10. 10.Double 98 =
  11. 11.Half of 192 =
  12. 12.Half of 154 =
  13. 13.Half of 116 =
  14. 14.Half of 148 =
  15. 15.Half of 92 =
  16. 16.Double 41 =
  17. 17.Half of 170 =
  18. 18.Double 64 =
  19. 19.Half of 182 =
  20. 20.Half of 104 =
  21. 21.Double 73 =
  22. 22.Half of 184 =
  23. 23.Double 29 =
  24. 24.Half of 194 =
  25. 25.Double 23 =
  26. 26.Half of 40 =
  27. 27.Double 77 =
  28. 28.Half of 96 =
  29. 29.Half of 120 =
  30. 30.Double 24 =
  31. 31.Double 72 =
  32. 32.Double 84 =
  33. 33.Half of 198 =
  34. 34.Half of 158 =
  35. 35.Double 76 =
  36. 36.Double 92 =
  37. 37.Double 95 =
  38. 38.Half of 48 =
  39. 39.Double 75 =
  40. 40.Half of 30 =

Answer key

  1. 124
  2. 86
  3. 22
  4. 110
  5. 142
  6. 122
  7. 134
  8. 162
  9. 36
  10. 196
  11. 96
  12. 77
  13. 58
  14. 74
  15. 46
  16. 82
  17. 85
  18. 128
  19. 91
  20. 52
  21. 146
  22. 92
  23. 58
  24. 97
  25. 46
  26. 20
  27. 154
  28. 48
  29. 60
  30. 48
  31. 144
  32. 168
  33. 99
  34. 79
  35. 152
  36. 184
  37. 190
  38. 24
  39. 150
  40. 15

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