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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 333 · 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. 1.43 × 8 =
  2. 2.27 × 4 =
  3. 3.33 × 8 =
  4. 4.142 × 4 =
  5. 5.15 × 8 =
  6. 6.133 × 4 =
  7. 7.143 × 4 =
  8. 8.54 × 8 =
  9. 9.146 × 4 =
  10. 10.14 × 4 =
  11. 11.62 × 8 =
  12. 12.47 × 8 =
  13. 13.21 × 8 =
  14. 14.49 × 4 =
  15. 15.104 × 4 =
  16. 16.62 × 8 =
  17. 17.70 × 8 =
  18. 18.34 × 4 =
  19. 19.51 × 4 =
  20. 20.19 × 8 =
  21. 21.54 × 8 =
  22. 22.65 × 8 =
  23. 23.51 × 4 =
  24. 24.50 × 8 =
  25. 25.57 × 4 =
  26. 26.34 × 8 =
  27. 27.151 × 4 =
  28. 28.99 × 4 =
  29. 29.74 × 8 =
  30. 30.100 × 4 =
  31. 31.27 × 8 =
  32. 32.118 × 4 =
  33. 33.87 × 4 =
  34. 34.139 × 4 =
  35. 35.111 × 4 =
  36. 36.29 × 8 =
  37. 37.139 × 4 =
  38. 38.146 × 4 =
  39. 39.44 × 8 =
  40. 40.38 × 8 =

Answer key

  1. 344
  2. 108
  3. 264
  4. 568
  5. 120
  6. 532
  7. 572
  8. 432
  9. 584
  10. 56
  11. 496
  12. 376
  13. 168
  14. 196
  15. 416
  16. 496
  17. 560
  18. 136
  19. 204
  20. 152
  21. 432
  22. 520
  23. 204
  24. 400
  25. 228
  26. 272
  27. 604
  28. 396
  29. 592
  30. 400
  31. 216
  32. 472
  33. 348
  34. 556
  35. 444
  36. 232
  37. 556
  38. 584
  39. 352
  40. 304

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