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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 567 · 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. 1.137 × 4 =
  2. 2.23 × 8 =
  3. 3.20 × 8 =
  4. 4.18 × 4 =
  5. 5.25 × 8 =
  6. 6.74 × 8 =
  7. 7.32 × 4 =
  8. 8.121 × 4 =
  9. 9.72 × 4 =
  10. 10.48 × 8 =
  11. 11.17 × 8 =
  12. 12.157 × 4 =
  13. 13.45 × 8 =
  14. 14.58 × 8 =
  15. 15.52 × 8 =
  16. 16.81 × 4 =
  17. 17.49 × 8 =
  18. 18.155 × 4 =
  19. 19.47 × 8 =
  20. 20.124 × 4 =
  21. 21.25 × 8 =
  22. 22.62 × 8 =
  23. 23.49 × 4 =
  24. 24.132 × 4 =
  25. 25.43 × 4 =
  26. 26.24 × 8 =
  27. 27.89 × 4 =
  28. 28.71 × 8 =
  29. 29.66 × 4 =
  30. 30.102 × 4 =
  31. 31.48 × 8 =
  32. 32.156 × 4 =
  33. 33.56 × 4 =
  34. 34.20 × 4 =
  35. 35.121 × 4 =
  36. 36.123 × 4 =
  37. 37.96 × 4 =
  38. 38.144 × 4 =
  39. 39.78 × 4 =
  40. 40.84 × 4 =

Answer key

  1. 548
  2. 184
  3. 160
  4. 72
  5. 200
  6. 592
  7. 128
  8. 484
  9. 288
  10. 384
  11. 136
  12. 628
  13. 360
  14. 464
  15. 416
  16. 324
  17. 392
  18. 620
  19. 376
  20. 496
  21. 200
  22. 496
  23. 196
  24. 528
  25. 172
  26. 192
  27. 356
  28. 568
  29. 264
  30. 408
  31. 384
  32. 624
  33. 224
  34. 80
  35. 484
  36. 492
  37. 384
  38. 576
  39. 312
  40. 336

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