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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 158 · 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. 1.50 × 4 =
  2. 2.93 × 4 =
  3. 3.47 × 8 =
  4. 4.98 × 4 =
  5. 5.57 × 8 =
  6. 6.66 × 4 =
  7. 7.47 × 4 =
  8. 8.13 × 4 =
  9. 9.23 × 8 =
  10. 10.54 × 8 =
  11. 11.149 × 4 =
  12. 12.154 × 4 =
  13. 13.109 × 4 =
  14. 14.32 × 4 =
  15. 15.40 × 8 =
  16. 16.90 × 4 =
  17. 17.51 × 4 =
  18. 18.12 × 8 =
  19. 19.65 × 4 =
  20. 20.20 × 8 =
  21. 21.145 × 4 =
  22. 22.132 × 4 =
  23. 23.147 × 4 =
  24. 24.33 × 4 =
  25. 25.160 × 4 =
  26. 26.117 × 4 =
  27. 27.22 × 8 =
  28. 28.26 × 8 =
  29. 29.99 × 4 =
  30. 30.94 × 4 =
  31. 31.81 × 4 =
  32. 32.50 × 4 =
  33. 33.61 × 8 =
  34. 34.21 × 8 =
  35. 35.56 × 8 =
  36. 36.27 × 4 =
  37. 37.34 × 8 =
  38. 38.120 × 4 =
  39. 39.42 × 4 =
  40. 40.92 × 4 =

Answer key

  1. 200
  2. 372
  3. 376
  4. 392
  5. 456
  6. 264
  7. 188
  8. 52
  9. 184
  10. 432
  11. 596
  12. 616
  13. 436
  14. 128
  15. 320
  16. 360
  17. 204
  18. 96
  19. 260
  20. 160
  21. 580
  22. 528
  23. 588
  24. 132
  25. 640
  26. 468
  27. 176
  28. 208
  29. 396
  30. 376
  31. 324
  32. 200
  33. 488
  34. 168
  35. 448
  36. 108
  37. 272
  38. 480
  39. 168
  40. 368

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