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Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 953 · 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 176 =
  2. 2.Half of 44 =
  3. 3.Half of 148 =
  4. 4.Half of 82 =
  5. 5.Half of 32 =
  6. 6.Double 23 =
  7. 7.Double 45 =
  8. 8.Double 25 =
  9. 9.Double 48 =
  10. 10.Half of 120 =
  11. 11.Half of 52 =
  12. 12.Half of 80 =
  13. 13.Half of 46 =
  14. 14.Half of 72 =
  15. 15.Double 96 =
  16. 16.Double 39 =
  17. 17.Double 31 =
  18. 18.Double 58 =
  19. 19.Half of 134 =
  20. 20.Double 57 =
  21. 21.Double 22 =
  22. 22.Half of 196 =
  23. 23.Double 24 =
  24. 24.Double 27 =
  25. 25.Half of 160 =
  26. 26.Double 61 =
  27. 27.Half of 112 =
  28. 28.Double 71 =
  29. 29.Double 47 =
  30. 30.Double 83 =
  31. 31.Double 43 =
  32. 32.Double 65 =
  33. 33.Double 63 =
  34. 34.Half of 26 =
  35. 35.Half of 150 =
  36. 36.Half of 174 =
  37. 37.Half of 194 =
  38. 38.Half of 156 =
  39. 39.Double 89 =
  40. 40.Double 32 =

Answer key

  1. 88
  2. 22
  3. 74
  4. 41
  5. 16
  6. 46
  7. 90
  8. 50
  9. 96
  10. 60
  11. 26
  12. 40
  13. 23
  14. 36
  15. 192
  16. 78
  17. 62
  18. 116
  19. 67
  20. 114
  21. 44
  22. 98
  23. 48
  24. 54
  25. 80
  26. 122
  27. 56
  28. 142
  29. 94
  30. 166
  31. 86
  32. 130
  33. 126
  34. 13
  35. 75
  36. 87
  37. 97
  38. 78
  39. 178
  40. 64

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