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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 359 · 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. 1.73 × 8 =
  2. 2.74 × 8 =
  3. 3.106 × 4 =
  4. 4.55 × 8 =
  5. 5.138 × 4 =
  6. 6.26 × 8 =
  7. 7.108 × 4 =
  8. 8.20 × 4 =
  9. 9.27 × 8 =
  10. 10.75 × 8 =
  11. 11.119 × 4 =
  12. 12.74 × 4 =
  13. 13.34 × 8 =
  14. 14.158 × 4 =
  15. 15.24 × 4 =
  16. 16.48 × 8 =
  17. 17.132 × 4 =
  18. 18.151 × 4 =
  19. 19.128 × 4 =
  20. 20.36 × 8 =
  21. 21.23 × 8 =
  22. 22.35 × 8 =
  23. 23.86 × 4 =
  24. 24.38 × 8 =
  25. 25.142 × 4 =
  26. 26.129 × 4 =
  27. 27.121 × 4 =
  28. 28.50 × 8 =
  29. 29.73 × 8 =
  30. 30.87 × 4 =
  31. 31.94 × 4 =
  32. 32.22 × 8 =
  33. 33.32 × 8 =
  34. 34.12 × 8 =
  35. 35.52 × 8 =
  36. 36.151 × 4 =
  37. 37.46 × 8 =
  38. 38.36 × 4 =
  39. 39.41 × 4 =
  40. 40.133 × 4 =

Answer key

  1. 584
  2. 592
  3. 424
  4. 440
  5. 552
  6. 208
  7. 432
  8. 80
  9. 216
  10. 600
  11. 476
  12. 296
  13. 272
  14. 632
  15. 96
  16. 384
  17. 528
  18. 604
  19. 512
  20. 288
  21. 184
  22. 280
  23. 344
  24. 304
  25. 568
  26. 516
  27. 484
  28. 400
  29. 584
  30. 348
  31. 376
  32. 176
  33. 256
  34. 96
  35. 416
  36. 604
  37. 368
  38. 144
  39. 164
  40. 532

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