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Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 793 · 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 47 =
  2. 2.Double 38 =
  3. 3.Double 22 =
  4. 4.Double 98 =
  5. 5.Double 57 =
  6. 6.Half of 140 =
  7. 7.Half of 174 =
  8. 8.Double 85 =
  9. 9.Double 93 =
  10. 10.Double 42 =
  11. 11.Half of 52 =
  12. 12.Half of 142 =
  13. 13.Double 25 =
  14. 14.Half of 116 =
  15. 15.Half of 192 =
  16. 16.Double 41 =
  17. 17.Half of 170 =
  18. 18.Double 66 =
  19. 19.Double 64 =
  20. 20.Double 97 =
  21. 21.Double 26 =
  22. 22.Double 67 =
  23. 23.Half of 80 =
  24. 24.Half of 48 =
  25. 25.Half of 182 =
  26. 26.Double 94 =
  27. 27.Half of 154 =
  28. 28.Half of 104 =
  29. 29.Half of 122 =
  30. 30.Half of 162 =
  31. 31.Double 92 =
  32. 32.Double 33 =
  33. 33.Double 69 =
  34. 34.Half of 60 =
  35. 35.Half of 148 =
  36. 36.Double 28 =
  37. 37.Double 71 =
  38. 38.Double 68 =
  39. 39.Double 49 =
  40. 40.Half of 28 =

Answer key

  1. 94
  2. 76
  3. 44
  4. 196
  5. 114
  6. 70
  7. 87
  8. 170
  9. 186
  10. 84
  11. 26
  12. 71
  13. 50
  14. 58
  15. 96
  16. 82
  17. 85
  18. 132
  19. 128
  20. 194
  21. 52
  22. 134
  23. 40
  24. 24
  25. 91
  26. 188
  27. 77
  28. 52
  29. 61
  30. 81
  31. 184
  32. 66
  33. 138
  34. 30
  35. 74
  36. 56
  37. 142
  38. 136
  39. 98
  40. 14

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