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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 312 · 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. 1.68 × 8 =
  2. 2.157 × 4 =
  3. 3.17 × 4 =
  4. 4.33 × 4 =
  5. 5.75 × 8 =
  6. 6.153 × 4 =
  7. 7.44 × 8 =
  8. 8.21 × 8 =
  9. 9.91 × 4 =
  10. 10.111 × 4 =
  11. 11.73 × 8 =
  12. 12.63 × 8 =
  13. 13.52 × 8 =
  14. 14.54 × 8 =
  15. 15.33 × 8 =
  16. 16.30 × 8 =
  17. 17.54 × 8 =
  18. 18.113 × 4 =
  19. 19.68 × 8 =
  20. 20.47 × 4 =
  21. 21.54 × 8 =
  22. 22.60 × 4 =
  23. 23.43 × 8 =
  24. 24.101 × 4 =
  25. 25.24 × 4 =
  26. 26.136 × 4 =
  27. 27.23 × 4 =
  28. 28.35 × 4 =
  29. 29.137 × 4 =
  30. 30.50 × 4 =
  31. 31.49 × 8 =
  32. 32.55 × 4 =
  33. 33.99 × 4 =
  34. 34.106 × 4 =
  35. 35.57 × 8 =
  36. 36.29 × 8 =
  37. 37.72 × 8 =
  38. 38.49 × 8 =
  39. 39.146 × 4 =
  40. 40.73 × 8 =

Answer key

  1. 544
  2. 628
  3. 68
  4. 132
  5. 600
  6. 612
  7. 352
  8. 168
  9. 364
  10. 444
  11. 584
  12. 504
  13. 416
  14. 432
  15. 264
  16. 240
  17. 432
  18. 452
  19. 544
  20. 188
  21. 432
  22. 240
  23. 344
  24. 404
  25. 96
  26. 544
  27. 92
  28. 140
  29. 548
  30. 200
  31. 392
  32. 220
  33. 396
  34. 424
  35. 456
  36. 232
  37. 576
  38. 392
  39. 584
  40. 584

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