← Doubling and halving lesson New set →

Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 566 · 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 66 =
  2. 2.Half of 76 =
  3. 3.Double 28 =
  4. 4.Double 85 =
  5. 5.Double 62 =
  6. 6.Half of 192 =
  7. 7.Double 49 =
  8. 8.Half of 58 =
  9. 9.Half of 40 =
  10. 10.Half of 182 =
  11. 11.Double 72 =
  12. 12.Double 58 =
  13. 13.Half of 168 =
  14. 14.Half of 52 =
  15. 15.Half of 68 =
  16. 16.Double 35 =
  17. 17.Double 56 =
  18. 18.Double 98 =
  19. 19.Double 84 =
  20. 20.Double 22 =
  21. 21.Double 88 =
  22. 22.Double 68 =
  23. 23.Half of 70 =
  24. 24.Half of 198 =
  25. 25.Half of 180 =
  26. 26.Double 32 =
  27. 27.Double 29 =
  28. 28.Half of 150 =
  29. 29.Half of 122 =
  30. 30.Half of 86 =
  31. 31.Double 81 =
  32. 32.Half of 44 =
  33. 33.Half of 188 =
  34. 34.Double 99 =
  35. 35.Half of 110 =
  36. 36.Double 25 =
  37. 37.Double 31 =
  38. 38.Double 47 =
  39. 39.Double 55 =
  40. 40.Double 74 =

Answer key

  1. 33
  2. 38
  3. 56
  4. 170
  5. 124
  6. 96
  7. 98
  8. 29
  9. 20
  10. 91
  11. 144
  12. 116
  13. 84
  14. 26
  15. 34
  16. 70
  17. 112
  18. 196
  19. 168
  20. 44
  21. 176
  22. 136
  23. 35
  24. 99
  25. 90
  26. 64
  27. 58
  28. 75
  29. 61
  30. 43
  31. 162
  32. 22
  33. 94
  34. 198
  35. 55
  36. 50
  37. 62
  38. 94
  39. 110
  40. 148

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