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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 627 · 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. 1.49 × 8 =
  2. 2.106 × 4 =
  3. 3.57 × 8 =
  4. 4.47 × 4 =
  5. 5.70 × 4 =
  6. 6.20 × 8 =
  7. 7.16 × 4 =
  8. 8.82 × 4 =
  9. 9.73 × 8 =
  10. 10.59 × 8 =
  11. 11.40 × 8 =
  12. 12.53 × 8 =
  13. 13.84 × 4 =
  14. 14.63 × 8 =
  15. 15.14 × 4 =
  16. 16.89 × 4 =
  17. 17.37 × 8 =
  18. 18.29 × 4 =
  19. 19.122 × 4 =
  20. 20.103 × 4 =
  21. 21.96 × 4 =
  22. 22.26 × 8 =
  23. 23.44 × 8 =
  24. 24.68 × 4 =
  25. 25.140 × 4 =
  26. 26.128 × 4 =
  27. 27.53 × 4 =
  28. 28.38 × 8 =
  29. 29.49 × 4 =
  30. 30.63 × 4 =
  31. 31.139 × 4 =
  32. 32.31 × 8 =
  33. 33.27 × 4 =
  34. 34.63 × 8 =
  35. 35.19 × 8 =
  36. 36.121 × 4 =
  37. 37.24 × 8 =
  38. 38.130 × 4 =
  39. 39.60 × 8 =
  40. 40.21 × 8 =

Answer key

  1. 392
  2. 424
  3. 456
  4. 188
  5. 280
  6. 160
  7. 64
  8. 328
  9. 584
  10. 472
  11. 320
  12. 424
  13. 336
  14. 504
  15. 56
  16. 356
  17. 296
  18. 116
  19. 488
  20. 412
  21. 384
  22. 208
  23. 352
  24. 272
  25. 560
  26. 512
  27. 212
  28. 304
  29. 196
  30. 252
  31. 556
  32. 248
  33. 108
  34. 504
  35. 152
  36. 484
  37. 192
  38. 520
  39. 480
  40. 168

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