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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 389 · 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. 2.39 × 8 =
  3. 3.73 × 4 =
  4. 4.37 × 8 =
  5. 5.47 × 8 =
  6. 6.22 × 8 =
  7. 7.124 × 4 =
  8. 8.148 × 4 =
  9. 9.91 × 4 =
  10. 10.56 × 8 =
  11. 11.118 × 4 =
  12. 12.140 × 4 =
  13. 13.114 × 4 =
  14. 14.71 × 8 =
  15. 15.68 × 4 =
  16. 16.122 × 4 =
  17. 17.160 × 4 =
  18. 18.25 × 4 =
  19. 19.47 × 8 =
  20. 20.28 × 8 =
  21. 21.49 × 4 =
  22. 22.67 × 4 =
  23. 23.60 × 8 =
  24. 24.29 × 4 =
  25. 25.148 × 4 =
  26. 26.73 × 8 =
  27. 27.52 × 8 =
  28. 28.56 × 8 =
  29. 29.154 × 4 =
  30. 30.60 × 8 =
  31. 31.139 × 4 =
  32. 32.96 × 4 =
  33. 33.48 × 8 =
  34. 34.131 × 4 =
  35. 35.22 × 8 =
  36. 36.21 × 8 =
  37. 37.84 × 4 =
  38. 38.17 × 8 =
  39. 39.43 × 8 =
  40. 40.40 × 8 =

Answer key

  1. 344
  2. 312
  3. 292
  4. 296
  5. 376
  6. 176
  7. 496
  8. 592
  9. 364
  10. 448
  11. 472
  12. 560
  13. 456
  14. 568
  15. 272
  16. 488
  17. 640
  18. 100
  19. 376
  20. 224
  21. 196
  22. 268
  23. 480
  24. 116
  25. 592
  26. 584
  27. 416
  28. 448
  29. 616
  30. 480
  31. 556
  32. 384
  33. 384
  34. 524
  35. 176
  36. 168
  37. 336
  38. 136
  39. 344
  40. 320

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