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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 55 · 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. 1.157 × 4 =
  2. 2.33 × 4 =
  3. 3.73 × 8 =
  4. 4.36 × 8 =
  5. 5.100 × 4 =
  6. 6.137 × 4 =
  7. 7.118 × 4 =
  8. 8.71 × 8 =
  9. 9.23 × 8 =
  10. 10.26 × 8 =
  11. 11.159 × 4 =
  12. 12.57 × 8 =
  13. 13.147 × 4 =
  14. 14.30 × 8 =
  15. 15.157 × 4 =
  16. 16.42 × 8 =
  17. 17.42 × 8 =
  18. 18.69 × 8 =
  19. 19.57 × 8 =
  20. 20.50 × 4 =
  21. 21.37 × 8 =
  22. 22.125 × 4 =
  23. 23.32 × 8 =
  24. 24.44 × 8 =
  25. 25.25 × 4 =
  26. 26.31 × 8 =
  27. 27.117 × 4 =
  28. 28.31 × 4 =
  29. 29.61 × 8 =
  30. 30.31 × 4 =
  31. 31.67 × 4 =
  32. 32.35 × 4 =
  33. 33.123 × 4 =
  34. 34.151 × 4 =
  35. 35.40 × 8 =
  36. 36.143 × 4 =
  37. 37.111 × 4 =
  38. 38.70 × 4 =
  39. 39.49 × 8 =
  40. 40.73 × 4 =

Answer key

  1. 628
  2. 132
  3. 584
  4. 288
  5. 400
  6. 548
  7. 472
  8. 568
  9. 184
  10. 208
  11. 636
  12. 456
  13. 588
  14. 240
  15. 628
  16. 336
  17. 336
  18. 552
  19. 456
  20. 200
  21. 296
  22. 500
  23. 256
  24. 352
  25. 100
  26. 248
  27. 468
  28. 124
  29. 488
  30. 124
  31. 268
  32. 140
  33. 492
  34. 604
  35. 320
  36. 572
  37. 444
  38. 280
  39. 392
  40. 292

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