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Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 298 · 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 76 =
  2. 2.Half of 198 =
  3. 3.Double 69 =
  4. 4.Double 44 =
  5. 5.Double 46 =
  6. 6.Double 18 =
  7. 7.Double 88 =
  8. 8.Double 84 =
  9. 9.Double 51 =
  10. 10.Half of 74 =
  11. 11.Double 34 =
  12. 12.Double 61 =
  13. 13.Half of 34 =
  14. 14.Double 73 =
  15. 15.Double 33 =
  16. 16.Half of 100 =
  17. 17.Double 71 =
  18. 18.Half of 52 =
  19. 19.Double 98 =
  20. 20.Half of 92 =
  21. 21.Half of 56 =
  22. 22.Half of 48 =
  23. 23.Double 72 =
  24. 24.Half of 182 =
  25. 25.Half of 120 =
  26. 26.Double 64 =
  27. 27.Double 75 =
  28. 28.Double 37 =
  29. 29.Half of 152 =
  30. 30.Half of 70 =
  31. 31.Half of 86 =
  32. 32.Double 41 =
  33. 33.Half of 160 =
  34. 34.Double 27 =
  35. 35.Double 21 =
  36. 36.Double 89 =
  37. 37.Half of 26 =
  38. 38.Half of 98 =
  39. 39.Double 99 =
  40. 40.Half of 90 =

Answer key

  1. 38
  2. 99
  3. 138
  4. 88
  5. 92
  6. 36
  7. 176
  8. 168
  9. 102
  10. 37
  11. 68
  12. 122
  13. 17
  14. 146
  15. 66
  16. 50
  17. 142
  18. 26
  19. 196
  20. 46
  21. 28
  22. 24
  23. 144
  24. 91
  25. 60
  26. 128
  27. 150
  28. 74
  29. 76
  30. 35
  31. 43
  32. 82
  33. 80
  34. 54
  35. 42
  36. 178
  37. 13
  38. 49
  39. 198
  40. 45

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