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Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 480 · 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 190 =
  2. 2.Half of 98 =
  3. 3.Double 94 =
  4. 4.Double 89 =
  5. 5.Double 93 =
  6. 6.Double 19 =
  7. 7.Double 59 =
  8. 8.Half of 36 =
  9. 9.Double 61 =
  10. 10.Half of 178 =
  11. 11.Double 75 =
  12. 12.Half of 112 =
  13. 13.Double 39 =
  14. 14.Double 76 =
  15. 15.Double 55 =
  16. 16.Double 81 =
  17. 17.Half of 194 =
  18. 18.Double 78 =
  19. 19.Double 31 =
  20. 20.Half of 52 =
  21. 21.Half of 188 =
  22. 22.Double 62 =
  23. 23.Double 32 =
  24. 24.Half of 184 =
  25. 25.Double 58 =
  26. 26.Half of 88 =
  27. 27.Double 54 =
  28. 28.Double 53 =
  29. 29.Half of 170 =
  30. 30.Double 23 =
  31. 31.Half of 180 =
  32. 32.Double 33 =
  33. 33.Double 35 =
  34. 34.Double 74 =
  35. 35.Half of 114 =
  36. 36.Half of 44 =
  37. 37.Double 71 =
  38. 38.Half of 150 =
  39. 39.Double 97 =
  40. 40.Half of 126 =

Answer key

  1. 95
  2. 49
  3. 188
  4. 178
  5. 186
  6. 38
  7. 118
  8. 18
  9. 122
  10. 89
  11. 150
  12. 56
  13. 78
  14. 152
  15. 110
  16. 162
  17. 97
  18. 156
  19. 62
  20. 26
  21. 94
  22. 124
  23. 64
  24. 92
  25. 116
  26. 44
  27. 108
  28. 106
  29. 85
  30. 46
  31. 90
  32. 66
  33. 70
  34. 148
  35. 57
  36. 22
  37. 142
  38. 75
  39. 194
  40. 63

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