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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 787 · 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. 1.28 × 4 =
  2. 2.65 × 8 =
  3. 3.48 × 8 =
  4. 4.63 × 8 =
  5. 5.154 × 4 =
  6. 6.124 × 4 =
  7. 7.34 × 8 =
  8. 8.133 × 4 =
  9. 9.99 × 4 =
  10. 10.84 × 4 =
  11. 11.131 × 4 =
  12. 12.36 × 4 =
  13. 13.20 × 8 =
  14. 14.71 × 4 =
  15. 15.41 × 8 =
  16. 16.68 × 8 =
  17. 17.65 × 4 =
  18. 18.71 × 8 =
  19. 19.158 × 4 =
  20. 20.25 × 4 =
  21. 21.23 × 4 =
  22. 22.66 × 8 =
  23. 23.54 × 4 =
  24. 24.121 × 4 =
  25. 25.63 × 8 =
  26. 26.113 × 4 =
  27. 27.87 × 4 =
  28. 28.66 × 8 =
  29. 29.34 × 8 =
  30. 30.31 × 4 =
  31. 31.36 × 4 =
  32. 32.21 × 8 =
  33. 33.76 × 4 =
  34. 34.31 × 8 =
  35. 35.27 × 4 =
  36. 36.17 × 8 =
  37. 37.143 × 4 =
  38. 38.23 × 8 =
  39. 39.91 × 4 =
  40. 40.15 × 8 =

Answer key

  1. 112
  2. 520
  3. 384
  4. 504
  5. 616
  6. 496
  7. 272
  8. 532
  9. 396
  10. 336
  11. 524
  12. 144
  13. 160
  14. 284
  15. 328
  16. 544
  17. 260
  18. 568
  19. 632
  20. 100
  21. 92
  22. 528
  23. 216
  24. 484
  25. 504
  26. 452
  27. 348
  28. 528
  29. 272
  30. 124
  31. 144
  32. 168
  33. 304
  34. 248
  35. 108
  36. 136
  37. 572
  38. 184
  39. 364
  40. 120

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