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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 160 · 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. 1.28 × 8 =
  2. 2.20 × 4 =
  3. 3.128 × 4 =
  4. 4.121 × 4 =
  5. 5.32 × 4 =
  6. 6.48 × 4 =
  7. 7.64 × 4 =
  8. 8.160 × 4 =
  9. 9.136 × 4 =
  10. 10.28 × 8 =
  11. 11.123 × 4 =
  12. 12.82 × 4 =
  13. 13.42 × 8 =
  14. 14.54 × 8 =
  15. 15.20 × 4 =
  16. 16.89 × 4 =
  17. 17.101 × 4 =
  18. 18.134 × 4 =
  19. 19.24 × 4 =
  20. 20.57 × 8 =
  21. 21.22 × 8 =
  22. 22.51 × 8 =
  23. 23.51 × 8 =
  24. 24.26 × 4 =
  25. 25.15 × 8 =
  26. 26.158 × 4 =
  27. 27.27 × 4 =
  28. 28.45 × 8 =
  29. 29.45 × 4 =
  30. 30.96 × 4 =
  31. 31.70 × 4 =
  32. 32.40 × 8 =
  33. 33.124 × 4 =
  34. 34.21 × 8 =
  35. 35.49 × 4 =
  36. 36.36 × 8 =
  37. 37.26 × 8 =
  38. 38.64 × 8 =
  39. 39.36 × 4 =
  40. 40.57 × 4 =

Answer key

  1. 224
  2. 80
  3. 512
  4. 484
  5. 128
  6. 192
  7. 256
  8. 640
  9. 544
  10. 224
  11. 492
  12. 328
  13. 336
  14. 432
  15. 80
  16. 356
  17. 404
  18. 536
  19. 96
  20. 456
  21. 176
  22. 408
  23. 408
  24. 104
  25. 120
  26. 632
  27. 108
  28. 360
  29. 180
  30. 384
  31. 280
  32. 320
  33. 496
  34. 168
  35. 196
  36. 288
  37. 208
  38. 512
  39. 144
  40. 228

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