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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 597 · 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. 1.135 × 4 =
  2. 2.33 × 8 =
  3. 3.52 × 8 =
  4. 4.74 × 8 =
  5. 5.134 × 4 =
  6. 6.68 × 8 =
  7. 7.98 × 4 =
  8. 8.50 × 8 =
  9. 9.34 × 8 =
  10. 10.32 × 8 =
  11. 11.119 × 4 =
  12. 12.26 × 8 =
  13. 13.40 × 8 =
  14. 14.94 × 4 =
  15. 15.97 × 4 =
  16. 16.28 × 8 =
  17. 17.69 × 8 =
  18. 18.28 × 4 =
  19. 19.38 × 8 =
  20. 20.118 × 4 =
  21. 21.36 × 8 =
  22. 22.156 × 4 =
  23. 23.74 × 4 =
  24. 24.54 × 4 =
  25. 25.31 × 4 =
  26. 26.145 × 4 =
  27. 27.65 × 4 =
  28. 28.143 × 4 =
  29. 29.95 × 4 =
  30. 30.12 × 8 =
  31. 31.46 × 8 =
  32. 32.72 × 4 =
  33. 33.118 × 4 =
  34. 34.74 × 8 =
  35. 35.30 × 4 =
  36. 36.151 × 4 =
  37. 37.98 × 4 =
  38. 38.121 × 4 =
  39. 39.74 × 8 =
  40. 40.65 × 8 =

Answer key

  1. 540
  2. 264
  3. 416
  4. 592
  5. 536
  6. 544
  7. 392
  8. 400
  9. 272
  10. 256
  11. 476
  12. 208
  13. 320
  14. 376
  15. 388
  16. 224
  17. 552
  18. 112
  19. 304
  20. 472
  21. 288
  22. 624
  23. 296
  24. 216
  25. 124
  26. 580
  27. 260
  28. 572
  29. 380
  30. 96
  31. 368
  32. 288
  33. 472
  34. 592
  35. 120
  36. 604
  37. 392
  38. 484
  39. 592
  40. 520

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