← Doubling and halving lesson New set →

Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 843 · 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 102 =
  2. 2.Double 28 =
  3. 3.Half of 32 =
  4. 4.Half of 170 =
  5. 5.Double 69 =
  6. 6.Double 25 =
  7. 7.Half of 28 =
  8. 8.Double 46 =
  9. 9.Half of 78 =
  10. 10.Double 43 =
  11. 11.Double 41 =
  12. 12.Double 24 =
  13. 13.Half of 58 =
  14. 14.Double 49 =
  15. 15.Half of 194 =
  16. 16.Double 54 =
  17. 17.Half of 52 =
  18. 18.Half of 54 =
  19. 19.Half of 168 =
  20. 20.Double 94 =
  21. 21.Double 48 =
  22. 22.Double 39 =
  23. 23.Double 19 =
  24. 24.Half of 146 =
  25. 25.Double 98 =
  26. 26.Double 74 =
  27. 27.Half of 36 =
  28. 28.Double 93 =
  29. 29.Half of 64 =
  30. 30.Half of 160 =
  31. 31.Double 47 =
  32. 32.Half of 62 =
  33. 33.Double 99 =
  34. 34.Double 59 =
  35. 35.Double 65 =
  36. 36.Half of 48 =
  37. 37.Half of 176 =
  38. 38.Double 53 =
  39. 39.Double 23 =
  40. 40.Double 38 =

Answer key

  1. 51
  2. 56
  3. 16
  4. 85
  5. 138
  6. 50
  7. 14
  8. 92
  9. 39
  10. 86
  11. 82
  12. 48
  13. 29
  14. 98
  15. 97
  16. 108
  17. 26
  18. 27
  19. 84
  20. 188
  21. 96
  22. 78
  23. 38
  24. 73
  25. 196
  26. 148
  27. 18
  28. 186
  29. 32
  30. 80
  31. 94
  32. 31
  33. 198
  34. 118
  35. 130
  36. 24
  37. 88
  38. 106
  39. 46
  40. 76

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