← Doubling and halving lesson New set →

Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 626 · 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 58 =
  2. 2.Double 51 =
  3. 3.Half of 116 =
  4. 4.Double 57 =
  5. 5.Half of 196 =
  6. 6.Double 32 =
  7. 7.Double 41 =
  8. 8.Half of 26 =
  9. 9.Half of 76 =
  10. 10.Double 44 =
  11. 11.Half of 198 =
  12. 12.Half of 42 =
  13. 13.Double 76 =
  14. 14.Double 52 =
  15. 15.Double 87 =
  16. 16.Double 28 =
  17. 17.Double 53 =
  18. 18.Half of 50 =
  19. 19.Double 68 =
  20. 20.Double 33 =
  21. 21.Double 74 =
  22. 22.Half of 126 =
  23. 23.Double 82 =
  24. 24.Half of 166 =
  25. 25.Double 75 =
  26. 26.Half of 142 =
  27. 27.Double 63 =
  28. 28.Double 29 =
  29. 29.Half of 192 =
  30. 30.Double 27 =
  31. 31.Double 86 =
  32. 32.Half of 176 =
  33. 33.Double 92 =
  34. 34.Half of 72 =
  35. 35.Half of 94 =
  36. 36.Double 56 =
  37. 37.Double 54 =
  38. 38.Double 43 =
  39. 39.Double 46 =
  40. 40.Half of 170 =

Answer key

  1. 116
  2. 102
  3. 58
  4. 114
  5. 98
  6. 64
  7. 82
  8. 13
  9. 38
  10. 88
  11. 99
  12. 21
  13. 152
  14. 104
  15. 174
  16. 56
  17. 106
  18. 25
  19. 136
  20. 66
  21. 148
  22. 63
  23. 164
  24. 83
  25. 150
  26. 71
  27. 126
  28. 58
  29. 96
  30. 54
  31. 172
  32. 88
  33. 184
  34. 36
  35. 47
  36. 112
  37. 108
  38. 86
  39. 92
  40. 85

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