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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 505 · 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. 1.34 × 8 =
  2. 2.117 × 4 =
  3. 3.34 × 8 =
  4. 4.55 × 8 =
  5. 5.30 × 4 =
  6. 6.68 × 4 =
  7. 7.42 × 8 =
  8. 8.59 × 8 =
  9. 9.26 × 8 =
  10. 10.62 × 8 =
  11. 11.70 × 4 =
  12. 12.21 × 4 =
  13. 13.13 × 8 =
  14. 14.56 × 8 =
  15. 15.62 × 4 =
  16. 16.43 × 8 =
  17. 17.76 × 4 =
  18. 18.19 × 4 =
  19. 19.29 × 4 =
  20. 20.94 × 4 =
  21. 21.54 × 8 =
  22. 22.36 × 8 =
  23. 23.60 × 4 =
  24. 24.63 × 8 =
  25. 25.23 × 8 =
  26. 26.118 × 4 =
  27. 27.97 × 4 =
  28. 28.154 × 4 =
  29. 29.72 × 8 =
  30. 30.60 × 8 =
  31. 31.65 × 4 =
  32. 32.30 × 4 =
  33. 33.155 × 4 =
  34. 34.14 × 4 =
  35. 35.49 × 8 =
  36. 36.24 × 8 =
  37. 37.42 × 8 =
  38. 38.45 × 8 =
  39. 39.24 × 8 =
  40. 40.42 × 4 =

Answer key

  1. 272
  2. 468
  3. 272
  4. 440
  5. 120
  6. 272
  7. 336
  8. 472
  9. 208
  10. 496
  11. 280
  12. 84
  13. 104
  14. 448
  15. 248
  16. 344
  17. 304
  18. 76
  19. 116
  20. 376
  21. 432
  22. 288
  23. 240
  24. 504
  25. 184
  26. 472
  27. 388
  28. 616
  29. 576
  30. 480
  31. 260
  32. 120
  33. 620
  34. 56
  35. 392
  36. 192
  37. 336
  38. 360
  39. 192
  40. 168

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