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Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 819 · 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 96 =
  2. 2.Half of 64 =
  3. 3.Double 39 =
  4. 4.Half of 66 =
  5. 5.Half of 30 =
  6. 6.Half of 54 =
  7. 7.Double 98 =
  8. 8.Half of 130 =
  9. 9.Half of 174 =
  10. 10.Double 64 =
  11. 11.Double 23 =
  12. 12.Half of 102 =
  13. 13.Double 99 =
  14. 14.Double 26 =
  15. 15.Double 71 =
  16. 16.Half of 82 =
  17. 17.Half of 80 =
  18. 18.Half of 62 =
  19. 19.Double 38 =
  20. 20.Double 88 =
  21. 21.Half of 178 =
  22. 22.Half of 40 =
  23. 23.Double 51 =
  24. 24.Double 63 =
  25. 25.Half of 108 =
  26. 26.Double 34 =
  27. 27.Double 58 =
  28. 28.Half of 52 =
  29. 29.Double 18 =
  30. 30.Half of 70 =
  31. 31.Half of 112 =
  32. 32.Double 29 =
  33. 33.Half of 148 =
  34. 34.Half of 172 =
  35. 35.Half of 110 =
  36. 36.Half of 68 =
  37. 37.Half of 188 =
  38. 38.Double 69 =
  39. 39.Double 41 =
  40. 40.Half of 118 =

Answer key

  1. 48
  2. 32
  3. 78
  4. 33
  5. 15
  6. 27
  7. 196
  8. 65
  9. 87
  10. 128
  11. 46
  12. 51
  13. 198
  14. 52
  15. 142
  16. 41
  17. 40
  18. 31
  19. 76
  20. 176
  21. 89
  22. 20
  23. 102
  24. 126
  25. 54
  26. 68
  27. 116
  28. 26
  29. 36
  30. 35
  31. 56
  32. 58
  33. 74
  34. 86
  35. 55
  36. 34
  37. 94
  38. 138
  39. 82
  40. 59

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