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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 502 · 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. 1.122 × 4 =
  2. 2.119 × 4 =
  3. 3.50 × 4 =
  4. 4.22 × 8 =
  5. 5.12 × 8 =
  6. 6.41 × 8 =
  7. 7.82 × 4 =
  8. 8.114 × 4 =
  9. 9.154 × 4 =
  10. 10.158 × 4 =
  11. 11.40 × 8 =
  12. 12.140 × 4 =
  13. 13.108 × 4 =
  14. 14.135 × 4 =
  15. 15.42 × 4 =
  16. 16.83 × 4 =
  17. 17.25 × 8 =
  18. 18.65 × 8 =
  19. 19.55 × 8 =
  20. 20.74 × 4 =
  21. 21.44 × 8 =
  22. 22.39 × 4 =
  23. 23.79 × 4 =
  24. 24.29 × 8 =
  25. 25.19 × 8 =
  26. 26.25 × 8 =
  27. 27.121 × 4 =
  28. 28.25 × 8 =
  29. 29.32 × 4 =
  30. 30.144 × 4 =
  31. 31.38 × 8 =
  32. 32.155 × 4 =
  33. 33.59 × 8 =
  34. 34.37 × 4 =
  35. 35.70 × 8 =
  36. 36.31 × 8 =
  37. 37.15 × 8 =
  38. 38.156 × 4 =
  39. 39.160 × 4 =
  40. 40.115 × 4 =

Answer key

  1. 488
  2. 476
  3. 200
  4. 176
  5. 96
  6. 328
  7. 328
  8. 456
  9. 616
  10. 632
  11. 320
  12. 560
  13. 432
  14. 540
  15. 168
  16. 332
  17. 200
  18. 520
  19. 440
  20. 296
  21. 352
  22. 156
  23. 316
  24. 232
  25. 152
  26. 200
  27. 484
  28. 200
  29. 128
  30. 576
  31. 304
  32. 620
  33. 472
  34. 148
  35. 560
  36. 248
  37. 120
  38. 624
  39. 640
  40. 460

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