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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 356 · 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. 1.127 × 4 =
  2. 2.68 × 8 =
  3. 3.123 × 4 =
  4. 4.116 × 4 =
  5. 5.59 × 8 =
  6. 6.41 × 8 =
  7. 7.32 × 8 =
  8. 8.122 × 4 =
  9. 9.32 × 8 =
  10. 10.59 × 8 =
  11. 11.128 × 4 =
  12. 12.94 × 4 =
  13. 13.71 × 8 =
  14. 14.73 × 4 =
  15. 15.130 × 4 =
  16. 16.31 × 8 =
  17. 17.29 × 4 =
  18. 18.52 × 8 =
  19. 19.86 × 4 =
  20. 20.18 × 8 =
  21. 21.136 × 4 =
  22. 22.63 × 4 =
  23. 23.155 × 4 =
  24. 24.107 × 4 =
  25. 25.138 × 4 =
  26. 26.121 × 4 =
  27. 27.53 × 8 =
  28. 28.20 × 8 =
  29. 29.60 × 8 =
  30. 30.54 × 8 =
  31. 31.47 × 4 =
  32. 32.124 × 4 =
  33. 33.43 × 8 =
  34. 34.156 × 4 =
  35. 35.74 × 8 =
  36. 36.74 × 4 =
  37. 37.52 × 8 =
  38. 38.132 × 4 =
  39. 39.63 × 8 =
  40. 40.37 × 4 =

Answer key

  1. 508
  2. 544
  3. 492
  4. 464
  5. 472
  6. 328
  7. 256
  8. 488
  9. 256
  10. 472
  11. 512
  12. 376
  13. 568
  14. 292
  15. 520
  16. 248
  17. 116
  18. 416
  19. 344
  20. 144
  21. 544
  22. 252
  23. 620
  24. 428
  25. 552
  26. 484
  27. 424
  28. 160
  29. 480
  30. 432
  31. 188
  32. 496
  33. 344
  34. 624
  35. 592
  36. 296
  37. 416
  38. 528
  39. 504
  40. 148

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