← Doubling and halving lesson New set →

Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 934 · 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 66 =
  2. 2.Double 67 =
  3. 3.Half of 118 =
  4. 4.Half of 68 =
  5. 5.Double 25 =
  6. 6.Double 82 =
  7. 7.Half of 54 =
  8. 8.Double 24 =
  9. 9.Double 31 =
  10. 10.Double 23 =
  11. 11.Half of 112 =
  12. 12.Double 21 =
  13. 13.Half of 134 =
  14. 14.Half of 58 =
  15. 15.Double 28 =
  16. 16.Half of 70 =
  17. 17.Half of 64 =
  18. 18.Double 22 =
  19. 19.Double 61 =
  20. 20.Half of 182 =
  21. 21.Half of 124 =
  22. 22.Half of 142 =
  23. 23.Double 51 =
  24. 24.Half of 130 =
  25. 25.Double 35 =
  26. 26.Half of 92 =
  27. 27.Double 27 =
  28. 28.Half of 186 =
  29. 29.Double 74 =
  30. 30.Double 34 =
  31. 31.Double 16 =
  32. 32.Half of 162 =
  33. 33.Double 91 =
  34. 34.Double 99 =
  35. 35.Double 85 =
  36. 36.Double 53 =
  37. 37.Double 56 =
  38. 38.Double 32 =
  39. 39.Half of 56 =
  40. 40.Double 37 =

Answer key

  1. 132
  2. 134
  3. 59
  4. 34
  5. 50
  6. 164
  7. 27
  8. 48
  9. 62
  10. 46
  11. 56
  12. 42
  13. 67
  14. 29
  15. 56
  16. 35
  17. 32
  18. 44
  19. 122
  20. 91
  21. 62
  22. 71
  23. 102
  24. 65
  25. 70
  26. 46
  27. 54
  28. 93
  29. 148
  30. 68
  31. 32
  32. 81
  33. 182
  34. 198
  35. 170
  36. 106
  37. 112
  38. 64
  39. 28
  40. 74

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