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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 441 · 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. 1.59 × 4 =
  2. 2.79 × 4 =
  3. 3.17 × 4 =
  4. 4.57 × 4 =
  5. 5.14 × 8 =
  6. 6.70 × 4 =
  7. 7.144 × 4 =
  8. 8.14 × 8 =
  9. 9.52 × 8 =
  10. 10.17 × 8 =
  11. 11.62 × 8 =
  12. 12.141 × 4 =
  13. 13.51 × 8 =
  14. 14.128 × 4 =
  15. 15.72 × 8 =
  16. 16.79 × 4 =
  17. 17.70 × 4 =
  18. 18.49 × 8 =
  19. 19.113 × 4 =
  20. 20.70 × 8 =
  21. 21.45 × 4 =
  22. 22.90 × 4 =
  23. 23.15 × 4 =
  24. 24.23 × 8 =
  25. 25.36 × 4 =
  26. 26.127 × 4 =
  27. 27.105 × 4 =
  28. 28.53 × 8 =
  29. 29.60 × 8 =
  30. 30.72 × 4 =
  31. 31.41 × 4 =
  32. 32.74 × 4 =
  33. 33.99 × 4 =
  34. 34.53 × 8 =
  35. 35.157 × 4 =
  36. 36.17 × 4 =
  37. 37.60 × 4 =
  38. 38.87 × 4 =
  39. 39.93 × 4 =
  40. 40.149 × 4 =

Answer key

  1. 236
  2. 316
  3. 68
  4. 228
  5. 112
  6. 280
  7. 576
  8. 112
  9. 416
  10. 136
  11. 496
  12. 564
  13. 408
  14. 512
  15. 576
  16. 316
  17. 280
  18. 392
  19. 452
  20. 560
  21. 180
  22. 360
  23. 60
  24. 184
  25. 144
  26. 508
  27. 420
  28. 424
  29. 480
  30. 288
  31. 164
  32. 296
  33. 396
  34. 424
  35. 628
  36. 68
  37. 240
  38. 348
  39. 372
  40. 596

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