← Doubling and halving lesson New set →

Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 296 · 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 43 =
  2. 2.Half of 150 =
  3. 3.Half of 118 =
  4. 4.Half of 98 =
  5. 5.Half of 168 =
  6. 6.Half of 112 =
  7. 7.Double 17 =
  8. 8.Half of 76 =
  9. 9.Double 77 =
  10. 10.Half of 58 =
  11. 11.Half of 30 =
  12. 12.Double 57 =
  13. 13.Double 84 =
  14. 14.Double 61 =
  15. 15.Half of 94 =
  16. 16.Half of 122 =
  17. 17.Half of 46 =
  18. 18.Half of 110 =
  19. 19.Double 65 =
  20. 20.Half of 88 =
  21. 21.Half of 104 =
  22. 22.Double 69 =
  23. 23.Double 55 =
  24. 24.Half of 38 =
  25. 25.Double 38 =
  26. 26.Double 87 =
  27. 27.Double 68 =
  28. 28.Double 92 =
  29. 29.Half of 34 =
  30. 30.Double 98 =
  31. 31.Double 29 =
  32. 32.Half of 160 =
  33. 33.Double 97 =
  34. 34.Half of 176 =
  35. 35.Double 63 =
  36. 36.Half of 140 =
  37. 37.Double 64 =
  38. 38.Half of 82 =
  39. 39.Double 39 =
  40. 40.Half of 62 =

Answer key

  1. 86
  2. 75
  3. 59
  4. 49
  5. 84
  6. 56
  7. 34
  8. 38
  9. 154
  10. 29
  11. 15
  12. 114
  13. 168
  14. 122
  15. 47
  16. 61
  17. 23
  18. 55
  19. 130
  20. 44
  21. 52
  22. 138
  23. 110
  24. 19
  25. 76
  26. 174
  27. 136
  28. 184
  29. 17
  30. 196
  31. 58
  32. 80
  33. 194
  34. 88
  35. 126
  36. 70
  37. 128
  38. 41
  39. 78
  40. 31

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