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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 710 · 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. 1.14 × 4 =
  2. 2.20 × 8 =
  3. 3.30 × 4 =
  4. 4.48 × 8 =
  5. 5.107 × 4 =
  6. 6.140 × 4 =
  7. 7.77 × 4 =
  8. 8.105 × 4 =
  9. 9.32 × 8 =
  10. 10.37 × 8 =
  11. 11.61 × 8 =
  12. 12.139 × 4 =
  13. 13.33 × 8 =
  14. 14.61 × 8 =
  15. 15.147 × 4 =
  16. 16.141 × 4 =
  17. 17.141 × 4 =
  18. 18.87 × 4 =
  19. 19.41 × 8 =
  20. 20.26 × 8 =
  21. 21.34 × 8 =
  22. 22.60 × 8 =
  23. 23.16 × 8 =
  24. 24.84 × 4 =
  25. 25.46 × 4 =
  26. 26.111 × 4 =
  27. 27.46 × 8 =
  28. 28.99 × 4 =
  29. 29.68 × 8 =
  30. 30.22 × 8 =
  31. 31.30 × 8 =
  32. 32.27 × 8 =
  33. 33.156 × 4 =
  34. 34.30 × 8 =
  35. 35.158 × 4 =
  36. 36.36 × 8 =
  37. 37.152 × 4 =
  38. 38.33 × 8 =
  39. 39.74 × 4 =
  40. 40.19 × 8 =

Answer key

  1. 56
  2. 160
  3. 120
  4. 384
  5. 428
  6. 560
  7. 308
  8. 420
  9. 256
  10. 296
  11. 488
  12. 556
  13. 264
  14. 488
  15. 588
  16. 564
  17. 564
  18. 348
  19. 328
  20. 208
  21. 272
  22. 480
  23. 128
  24. 336
  25. 184
  26. 444
  27. 368
  28. 396
  29. 544
  30. 176
  31. 240
  32. 216
  33. 624
  34. 240
  35. 632
  36. 288
  37. 608
  38. 264
  39. 296
  40. 152

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