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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 426 · 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 × 4 =
  2. 2.45 × 4 =
  3. 3.73 × 4 =
  4. 4.26 × 4 =
  5. 5.20 × 8 =
  6. 6.32 × 8 =
  7. 7.104 × 4 =
  8. 8.93 × 4 =
  9. 9.62 × 8 =
  10. 10.145 × 4 =
  11. 11.144 × 4 =
  12. 12.140 × 4 =
  13. 13.131 × 4 =
  14. 14.68 × 8 =
  15. 15.23 × 8 =
  16. 16.73 × 4 =
  17. 17.13 × 8 =
  18. 18.54 × 8 =
  19. 19.35 × 8 =
  20. 20.68 × 4 =
  21. 21.92 × 4 =
  22. 22.21 × 8 =
  23. 23.130 × 4 =
  24. 24.154 × 4 =
  25. 25.40 × 8 =
  26. 26.28 × 8 =
  27. 27.149 × 4 =
  28. 28.48 × 8 =
  29. 29.43 × 8 =
  30. 30.63 × 8 =
  31. 31.82 × 4 =
  32. 32.68 × 8 =
  33. 33.42 × 8 =
  34. 34.98 × 4 =
  35. 35.160 × 4 =
  36. 36.158 × 4 =
  37. 37.41 × 4 =
  38. 38.43 × 8 =
  39. 39.101 × 4 =
  40. 40.65 × 4 =

Answer key

  1. 172
  2. 180
  3. 292
  4. 104
  5. 160
  6. 256
  7. 416
  8. 372
  9. 496
  10. 580
  11. 576
  12. 560
  13. 524
  14. 544
  15. 184
  16. 292
  17. 104
  18. 432
  19. 280
  20. 272
  21. 368
  22. 168
  23. 520
  24. 616
  25. 320
  26. 224
  27. 596
  28. 384
  29. 344
  30. 504
  31. 328
  32. 544
  33. 336
  34. 392
  35. 640
  36. 632
  37. 164
  38. 344
  39. 404
  40. 260

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