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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 887 · 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. 1.98 × 4 =
  2. 2.47 × 4 =
  3. 3.53 × 8 =
  4. 4.25 × 4 =
  5. 5.26 × 4 =
  6. 6.38 × 4 =
  7. 7.143 × 4 =
  8. 8.70 × 8 =
  9. 9.22 × 4 =
  10. 10.71 × 4 =
  11. 11.156 × 4 =
  12. 12.37 × 8 =
  13. 13.29 × 8 =
  14. 14.84 × 4 =
  15. 15.71 × 8 =
  16. 16.23 × 8 =
  17. 17.22 × 4 =
  18. 18.46 × 4 =
  19. 19.43 × 4 =
  20. 20.69 × 8 =
  21. 21.34 × 4 =
  22. 22.64 × 8 =
  23. 23.17 × 8 =
  24. 24.52 × 4 =
  25. 25.46 × 8 =
  26. 26.15 × 8 =
  27. 27.26 × 8 =
  28. 28.56 × 8 =
  29. 29.47 × 4 =
  30. 30.26 × 4 =
  31. 31.65 × 8 =
  32. 32.40 × 8 =
  33. 33.55 × 4 =
  34. 34.159 × 4 =
  35. 35.13 × 8 =
  36. 36.70 × 4 =
  37. 37.58 × 8 =
  38. 38.82 × 4 =
  39. 39.40 × 4 =
  40. 40.51 × 8 =

Answer key

  1. 392
  2. 188
  3. 424
  4. 100
  5. 104
  6. 152
  7. 572
  8. 560
  9. 88
  10. 284
  11. 624
  12. 296
  13. 232
  14. 336
  15. 568
  16. 184
  17. 88
  18. 184
  19. 172
  20. 552
  21. 136
  22. 512
  23. 136
  24. 208
  25. 368
  26. 120
  27. 208
  28. 448
  29. 188
  30. 104
  31. 520
  32. 320
  33. 220
  34. 636
  35. 104
  36. 280
  37. 464
  38. 328
  39. 160
  40. 408

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