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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 484 · 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. 1.55 × 4 =
  2. 2.59 × 4 =
  3. 3.26 × 4 =
  4. 4.19 × 8 =
  5. 5.34 × 8 =
  6. 6.38 × 8 =
  7. 7.71 × 4 =
  8. 8.42 × 4 =
  9. 9.58 × 4 =
  10. 10.29 × 8 =
  11. 11.17 × 8 =
  12. 12.19 × 4 =
  13. 13.21 × 4 =
  14. 14.64 × 4 =
  15. 15.48 × 4 =
  16. 16.26 × 8 =
  17. 17.29 × 4 =
  18. 18.30 × 4 =
  19. 19.33 × 8 =
  20. 20.28 × 4 =
  21. 21.39 × 8 =
  22. 22.15 × 4 =
  23. 23.37 × 8 =
  24. 24.68 × 4 =
  25. 25.14 × 8 =
  26. 26.70 × 4 =
  27. 27.13 × 8 =
  28. 28.25 × 4 =
  29. 29.18 × 4 =
  30. 30.25 × 8 =
  31. 31.38 × 4 =
  32. 32.32 × 8 =
  33. 33.33 × 4 =
  34. 34.46 × 4 =
  35. 35.31 × 8 =
  36. 36.18 × 8 =
  37. 37.23 × 4 =
  38. 38.49 × 4 =
  39. 39.52 × 4 =
  40. 40.34 × 4 =

Answer key

  1. 220
  2. 236
  3. 104
  4. 152
  5. 272
  6. 304
  7. 284
  8. 168
  9. 232
  10. 232
  11. 136
  12. 76
  13. 84
  14. 256
  15. 192
  16. 208
  17. 116
  18. 120
  19. 264
  20. 112
  21. 312
  22. 60
  23. 296
  24. 272
  25. 112
  26. 280
  27. 104
  28. 100
  29. 72
  30. 200
  31. 152
  32. 256
  33. 132
  34. 184
  35. 248
  36. 144
  37. 92
  38. 196
  39. 208
  40. 136

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