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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 207 · 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. 1.51 × 4 =
  2. 2.147 × 4 =
  3. 3.25 × 8 =
  4. 4.154 × 4 =
  5. 5.127 × 4 =
  6. 6.29 × 4 =
  7. 7.65 × 4 =
  8. 8.42 × 8 =
  9. 9.48 × 4 =
  10. 10.145 × 4 =
  11. 11.141 × 4 =
  12. 12.46 × 8 =
  13. 13.141 × 4 =
  14. 14.32 × 4 =
  15. 15.71 × 8 =
  16. 16.23 × 4 =
  17. 17.73 × 8 =
  18. 18.43 × 8 =
  19. 19.113 × 4 =
  20. 20.110 × 4 =
  21. 21.70 × 8 =
  22. 22.69 × 8 =
  23. 23.73 × 4 =
  24. 24.77 × 4 =
  25. 25.48 × 4 =
  26. 26.130 × 4 =
  27. 27.50 × 8 =
  28. 28.38 × 8 =
  29. 29.68 × 4 =
  30. 30.57 × 8 =
  31. 31.43 × 8 =
  32. 32.60 × 4 =
  33. 33.24 × 8 =
  34. 34.52 × 8 =
  35. 35.92 × 4 =
  36. 36.18 × 4 =
  37. 37.145 × 4 =
  38. 38.46 × 8 =
  39. 39.51 × 4 =
  40. 40.140 × 4 =

Answer key

  1. 204
  2. 588
  3. 200
  4. 616
  5. 508
  6. 116
  7. 260
  8. 336
  9. 192
  10. 580
  11. 564
  12. 368
  13. 564
  14. 128
  15. 568
  16. 92
  17. 584
  18. 344
  19. 452
  20. 440
  21. 560
  22. 552
  23. 292
  24. 308
  25. 192
  26. 520
  27. 400
  28. 304
  29. 272
  30. 456
  31. 344
  32. 240
  33. 192
  34. 416
  35. 368
  36. 72
  37. 580
  38. 368
  39. 204
  40. 560

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