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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 591 · 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. 1.72 × 8 =
  2. 2.23 × 4 =
  3. 3.85 × 4 =
  4. 4.43 × 4 =
  5. 5.74 × 8 =
  6. 6.81 × 4 =
  7. 7.23 × 8 =
  8. 8.65 × 8 =
  9. 9.86 × 4 =
  10. 10.75 × 8 =
  11. 11.63 × 8 =
  12. 12.112 × 4 =
  13. 13.27 × 8 =
  14. 14.24 × 4 =
  15. 15.121 × 4 =
  16. 16.48 × 8 =
  17. 17.15 × 4 =
  18. 18.136 × 4 =
  19. 19.71 × 8 =
  20. 20.159 × 4 =
  21. 21.38 × 8 =
  22. 22.17 × 8 =
  23. 23.126 × 4 =
  24. 24.120 × 4 =
  25. 25.25 × 8 =
  26. 26.30 × 8 =
  27. 27.27 × 8 =
  28. 28.100 × 4 =
  29. 29.61 × 4 =
  30. 30.42 × 8 =
  31. 31.37 × 8 =
  32. 32.137 × 4 =
  33. 33.29 × 8 =
  34. 34.54 × 8 =
  35. 35.66 × 8 =
  36. 36.107 × 4 =
  37. 37.61 × 4 =
  38. 38.109 × 4 =
  39. 39.118 × 4 =
  40. 40.130 × 4 =

Answer key

  1. 576
  2. 92
  3. 340
  4. 172
  5. 592
  6. 324
  7. 184
  8. 520
  9. 344
  10. 600
  11. 504
  12. 448
  13. 216
  14. 96
  15. 484
  16. 384
  17. 60
  18. 544
  19. 568
  20. 636
  21. 304
  22. 136
  23. 504
  24. 480
  25. 200
  26. 240
  27. 216
  28. 400
  29. 244
  30. 336
  31. 296
  32. 548
  33. 232
  34. 432
  35. 528
  36. 428
  37. 244
  38. 436
  39. 472
  40. 520

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