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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 201 · 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. 1.121 × 4 =
  2. 2.35 × 8 =
  3. 3.154 × 4 =
  4. 4.51 × 8 =
  5. 5.32 × 4 =
  6. 6.16 × 4 =
  7. 7.25 × 8 =
  8. 8.111 × 4 =
  9. 9.12 × 8 =
  10. 10.13 × 4 =
  11. 11.77 × 4 =
  12. 12.25 × 8 =
  13. 13.129 × 4 =
  14. 14.44 × 8 =
  15. 15.35 × 8 =
  16. 16.31 × 4 =
  17. 17.68 × 8 =
  18. 18.71 × 8 =
  19. 19.59 × 8 =
  20. 20.60 × 8 =
  21. 21.94 × 4 =
  22. 22.129 × 4 =
  23. 23.32 × 8 =
  24. 24.48 × 4 =
  25. 25.67 × 8 =
  26. 26.72 × 4 =
  27. 27.139 × 4 =
  28. 28.34 × 8 =
  29. 29.100 × 4 =
  30. 30.35 × 4 =
  31. 31.99 × 4 =
  32. 32.56 × 8 =
  33. 33.41 × 8 =
  34. 34.34 × 8 =
  35. 35.65 × 8 =
  36. 36.52 × 8 =
  37. 37.70 × 8 =
  38. 38.58 × 8 =
  39. 39.24 × 8 =
  40. 40.26 × 8 =

Answer key

  1. 484
  2. 280
  3. 616
  4. 408
  5. 128
  6. 64
  7. 200
  8. 444
  9. 96
  10. 52
  11. 308
  12. 200
  13. 516
  14. 352
  15. 280
  16. 124
  17. 544
  18. 568
  19. 472
  20. 480
  21. 376
  22. 516
  23. 256
  24. 192
  25. 536
  26. 288
  27. 556
  28. 272
  29. 400
  30. 140
  31. 396
  32. 448
  33. 328
  34. 272
  35. 520
  36. 416
  37. 560
  38. 464
  39. 192
  40. 208

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