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Doubling and Halving Mental Maths Worksheet

Mental maths lesson 9: Doubling and halving · Set 962 · 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 48 =
  2. 2.Half of 74 =
  3. 3.Double 63 =
  4. 4.Half of 148 =
  5. 5.Double 39 =
  6. 6.Double 74 =
  7. 7.Double 19 =
  8. 8.Double 25 =
  9. 9.Double 18 =
  10. 10.Half of 40 =
  11. 11.Double 93 =
  12. 12.Double 36 =
  13. 13.Double 88 =
  14. 14.Double 66 =
  15. 15.Double 37 =
  16. 16.Double 21 =
  17. 17.Double 99 =
  18. 18.Half of 124 =
  19. 19.Double 34 =
  20. 20.Double 82 =
  21. 21.Double 33 =
  22. 22.Double 75 =
  23. 23.Double 79 =
  24. 24.Double 53 =
  25. 25.Half of 62 =
  26. 26.Half of 126 =
  27. 27.Double 56 =
  28. 28.Half of 26 =
  29. 29.Double 52 =
  30. 30.Double 87 =
  31. 31.Double 69 =
  32. 32.Double 54 =
  33. 33.Half of 190 =
  34. 34.Half of 132 =
  35. 35.Double 78 =
  36. 36.Double 31 =
  37. 37.Half of 34 =
  38. 38.Double 22 =
  39. 39.Double 32 =
  40. 40.Double 16 =

Answer key

  1. 24
  2. 37
  3. 126
  4. 74
  5. 78
  6. 148
  7. 38
  8. 50
  9. 36
  10. 20
  11. 186
  12. 72
  13. 176
  14. 132
  15. 74
  16. 42
  17. 198
  18. 62
  19. 68
  20. 164
  21. 66
  22. 150
  23. 158
  24. 106
  25. 31
  26. 63
  27. 112
  28. 13
  29. 104
  30. 174
  31. 138
  32. 108
  33. 95
  34. 66
  35. 156
  36. 62
  37. 17
  38. 44
  39. 64
  40. 32

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