← Doubling sprints: × 4 and × 8 lesson New set →

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 497 · 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. 1.74 × 8 =
  2. 2.48 × 8 =
  3. 3.32 × 8 =
  4. 4.40 × 8 =
  5. 5.35 × 8 =
  6. 6.43 × 4 =
  7. 7.29 × 8 =
  8. 8.89 × 4 =
  9. 9.18 × 8 =
  10. 10.18 × 4 =
  11. 11.28 × 8 =
  12. 12.64 × 8 =
  13. 13.48 × 8 =
  14. 14.67 × 8 =
  15. 15.21 × 4 =
  16. 16.68 × 8 =
  17. 17.34 × 8 =
  18. 18.42 × 8 =
  19. 19.48 × 8 =
  20. 20.23 × 8 =
  21. 21.70 × 4 =
  22. 22.66 × 4 =
  23. 23.70 × 4 =
  24. 24.94 × 4 =
  25. 25.37 × 8 =
  26. 26.70 × 4 =
  27. 27.42 × 8 =
  28. 28.26 × 8 =
  29. 29.22 × 8 =
  30. 30.133 × 4 =
  31. 31.59 × 8 =
  32. 32.28 × 8 =
  33. 33.76 × 4 =
  34. 34.157 × 4 =
  35. 35.80 × 4 =
  36. 36.21 × 4 =
  37. 37.149 × 4 =
  38. 38.106 × 4 =
  39. 39.61 × 8 =
  40. 40.15 × 8 =

Answer key

  1. 592
  2. 384
  3. 256
  4. 320
  5. 280
  6. 172
  7. 232
  8. 356
  9. 144
  10. 72
  11. 224
  12. 512
  13. 384
  14. 536
  15. 84
  16. 544
  17. 272
  18. 336
  19. 384
  20. 184
  21. 280
  22. 264
  23. 280
  24. 376
  25. 296
  26. 280
  27. 336
  28. 208
  29. 176
  30. 532
  31. 472
  32. 224
  33. 304
  34. 628
  35. 320
  36. 84
  37. 596
  38. 424
  39. 488
  40. 120

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths