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Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 681 · 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 110 =
  2. 2.Double 87 =
  3. 3.Double 88 =
  4. 4.Half of 104 =
  5. 5.Double 64 =
  6. 6.Double 27 =
  7. 7.Double 59 =
  8. 8.Half of 178 =
  9. 9.Double 61 =
  10. 10.Double 75 =
  11. 11.Half of 162 =
  12. 12.Half of 170 =
  13. 13.Half of 82 =
  14. 14.Half of 134 =
  15. 15.Double 69 =
  16. 16.Half of 58 =
  17. 17.Double 29 =
  18. 18.Double 54 =
  19. 19.Half of 194 =
  20. 20.Double 71 =
  21. 21.Double 21 =
  22. 22.Double 26 =
  23. 23.Half of 186 =
  24. 24.Double 23 =
  25. 25.Double 37 =
  26. 26.Double 82 =
  27. 27.Double 96 =
  28. 28.Half of 190 =
  29. 29.Half of 156 =
  30. 30.Half of 60 =
  31. 31.Double 74 =
  32. 32.Half of 112 =
  33. 33.Half of 28 =
  34. 34.Half of 148 =
  35. 35.Double 16 =
  36. 36.Double 25 =
  37. 37.Double 55 =
  38. 38.Double 76 =
  39. 39.Half of 26 =
  40. 40.Half of 184 =

Answer key

  1. 55
  2. 174
  3. 176
  4. 52
  5. 128
  6. 54
  7. 118
  8. 89
  9. 122
  10. 150
  11. 81
  12. 85
  13. 41
  14. 67
  15. 138
  16. 29
  17. 58
  18. 108
  19. 97
  20. 142
  21. 42
  22. 52
  23. 93
  24. 46
  25. 74
  26. 164
  27. 192
  28. 95
  29. 78
  30. 30
  31. 148
  32. 56
  33. 14
  34. 74
  35. 32
  36. 50
  37. 110
  38. 152
  39. 13
  40. 92

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