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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 829 · 40 questions
TalentJR

How to do it in your head (Double, double, double): × 2: double once. × 4: double, then double again. × 8: double three times.

NameDateTime takenScore ___ / 40
  1. 1.66 × 4 =
  2. 2.23 × 4 =
  3. 3.62 × 4 =
  4. 4.46 × 4 =
  5. 5.36 × 4 =
  6. 6.25 × 8 =
  7. 7.25 × 4 =
  8. 8.14 × 8 =
  9. 9.29 × 8 =
  10. 10.13 × 8 =
  11. 11.38 × 4 =
  12. 12.26 × 4 =
  13. 13.21 × 8 =
  14. 14.39 × 8 =
  15. 15.24 × 4 =
  16. 16.42 × 4 =
  17. 17.31 × 8 =
  18. 18.51 × 4 =
  19. 19.55 × 4 =
  20. 20.35 × 4 =
  21. 21.35 × 8 =
  22. 22.63 × 4 =
  23. 23.21 × 4 =
  24. 24.41 × 4 =
  25. 25.31 × 4 =
  26. 26.50 × 4 =
  27. 27.33 × 8 =
  28. 28.68 × 4 =
  29. 29.18 × 4 =
  30. 30.16 × 8 =
  31. 31.33 × 4 =
  32. 32.22 × 4 =
  33. 33.30 × 8 =
  34. 34.38 × 8 =
  35. 35.15 × 4 =
  36. 36.71 × 4 =
  37. 37.22 × 8 =
  38. 38.58 × 4 =
  39. 39.16 × 4 =
  40. 40.60 × 4 =

Answer key

  1. 264
  2. 92
  3. 248
  4. 184
  5. 144
  6. 200
  7. 100
  8. 112
  9. 232
  10. 104
  11. 152
  12. 104
  13. 168
  14. 312
  15. 96
  16. 168
  17. 248
  18. 204
  19. 220
  20. 140
  21. 280
  22. 252
  23. 84
  24. 164
  25. 124
  26. 200
  27. 264
  28. 272
  29. 72
  30. 128
  31. 132
  32. 88
  33. 240
  34. 304
  35. 60
  36. 284
  37. 176
  38. 232
  39. 64
  40. 240

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