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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 44 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.54 × 4 =
  2. 2.25 × 8 =
  3. 3.109 × 4 =
  4. 4.53 × 4 =
  5. 5.19 × 8 =
  6. 6.77 × 4 =
  7. 7.58 × 4 =
  8. 8.22 × 8 =
  9. 9.79 × 4 =
  10. 10.63 × 8 =
  11. 11.131 × 4 =
  12. 12.64 × 4 =
  13. 13.85 × 4 =
  14. 14.59 × 8 =
  15. 15.142 × 4 =
  16. 16.23 × 8 =
  17. 17.157 × 4 =
  18. 18.137 × 4 =
  19. 19.22 × 8 =
  20. 20.43 × 8 =
  21. 21.33 × 4 =
  22. 22.41 × 4 =
  23. 23.46 × 8 =
  24. 24.155 × 4 =
  25. 25.119 × 4 =
  26. 26.70 × 8 =
  27. 27.45 × 4 =
  28. 28.45 × 8 =
  29. 29.160 × 4 =
  30. 30.63 × 8 =
  31. 31.32 × 8 =
  32. 32.37 × 8 =
  33. 33.42 × 4 =
  34. 34.69 × 8 =
  35. 35.67 × 4 =
  36. 36.68 × 4 =
  37. 37.57 × 8 =
  38. 38.59 × 4 =
  39. 39.42 × 8 =
  40. 40.109 × 4 =

Answer key

  1. 216
  2. 200
  3. 436
  4. 212
  5. 152
  6. 308
  7. 232
  8. 176
  9. 316
  10. 504
  11. 524
  12. 256
  13. 340
  14. 472
  15. 568
  16. 184
  17. 628
  18. 548
  19. 176
  20. 344
  21. 132
  22. 164
  23. 368
  24. 620
  25. 476
  26. 560
  27. 180
  28. 360
  29. 640
  30. 504
  31. 256
  32. 296
  33. 168
  34. 552
  35. 268
  36. 272
  37. 456
  38. 236
  39. 336
  40. 436

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