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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 436 · 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. 1.21 × 8 =
  2. 2.42 × 4 =
  3. 3.70 × 4 =
  4. 4.61 × 4 =
  5. 5.64 × 8 =
  6. 6.67 × 8 =
  7. 7.40 × 4 =
  8. 8.64 × 8 =
  9. 9.61 × 8 =
  10. 10.22 × 8 =
  11. 11.44 × 8 =
  12. 12.61 × 8 =
  13. 13.61 × 8 =
  14. 14.18 × 8 =
  15. 15.36 × 8 =
  16. 16.157 × 4 =
  17. 17.46 × 8 =
  18. 18.62 × 8 =
  19. 19.66 × 4 =
  20. 20.16 × 8 =
  21. 21.16 × 8 =
  22. 22.65 × 8 =
  23. 23.56 × 8 =
  24. 24.44 × 4 =
  25. 25.56 × 8 =
  26. 26.21 × 4 =
  27. 27.29 × 8 =
  28. 28.75 × 8 =
  29. 29.62 × 8 =
  30. 30.89 × 4 =
  31. 31.94 × 4 =
  32. 32.53 × 8 =
  33. 33.46 × 8 =
  34. 34.17 × 8 =
  35. 35.39 × 8 =
  36. 36.41 × 4 =
  37. 37.43 × 8 =
  38. 38.115 × 4 =
  39. 39.16 × 8 =
  40. 40.124 × 4 =

Answer key

  1. 168
  2. 168
  3. 280
  4. 244
  5. 512
  6. 536
  7. 160
  8. 512
  9. 488
  10. 176
  11. 352
  12. 488
  13. 488
  14. 144
  15. 288
  16. 628
  17. 368
  18. 496
  19. 264
  20. 128
  21. 128
  22. 520
  23. 448
  24. 176
  25. 448
  26. 84
  27. 232
  28. 600
  29. 496
  30. 356
  31. 376
  32. 424
  33. 368
  34. 136
  35. 312
  36. 164
  37. 344
  38. 460
  39. 128
  40. 496

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