← Doubling and halving lesson New set →

Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 612 · 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 186 =
  2. 2.Half of 104 =
  3. 3.Double 88 =
  4. 4.Half of 52 =
  5. 5.Half of 148 =
  6. 6.Double 58 =
  7. 7.Double 31 =
  8. 8.Half of 54 =
  9. 9.Half of 44 =
  10. 10.Double 57 =
  11. 11.Double 35 =
  12. 12.Double 25 =
  13. 13.Half of 62 =
  14. 14.Half of 158 =
  15. 15.Half of 108 =
  16. 16.Half of 88 =
  17. 17.Double 76 =
  18. 18.Half of 98 =
  19. 19.Double 21 =
  20. 20.Double 26 =
  21. 21.Double 86 =
  22. 22.Half of 174 =
  23. 23.Double 81 =
  24. 24.Half of 58 =
  25. 25.Double 46 =
  26. 26.Half of 94 =
  27. 27.Double 84 =
  28. 28.Half of 162 =
  29. 29.Double 17 =
  30. 30.Half of 40 =
  31. 31.Double 64 =
  32. 32.Double 32 =
  33. 33.Double 61 =
  34. 34.Double 93 =
  35. 35.Half of 26 =
  36. 36.Half of 142 =
  37. 37.Double 51 =
  38. 38.Half of 194 =
  39. 39.Double 87 =
  40. 40.Half of 176 =

Answer key

  1. 93
  2. 52
  3. 176
  4. 26
  5. 74
  6. 116
  7. 62
  8. 27
  9. 22
  10. 114
  11. 70
  12. 50
  13. 31
  14. 79
  15. 54
  16. 44
  17. 152
  18. 49
  19. 42
  20. 52
  21. 172
  22. 87
  23. 162
  24. 29
  25. 92
  26. 47
  27. 168
  28. 81
  29. 34
  30. 20
  31. 128
  32. 64
  33. 122
  34. 186
  35. 13
  36. 71
  37. 102
  38. 97
  39. 174
  40. 88

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