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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 390 · 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. 1.77 × 4 =
  2. 2.132 × 4 =
  3. 3.22 × 4 =
  4. 4.39 × 8 =
  5. 5.68 × 8 =
  6. 6.160 × 4 =
  7. 7.47 × 4 =
  8. 8.122 × 4 =
  9. 9.45 × 8 =
  10. 10.24 × 8 =
  11. 11.19 × 4 =
  12. 12.43 × 8 =
  13. 13.92 × 4 =
  14. 14.76 × 4 =
  15. 15.32 × 8 =
  16. 16.30 × 8 =
  17. 17.94 × 4 =
  18. 18.45 × 8 =
  19. 19.93 × 4 =
  20. 20.135 × 4 =
  21. 21.147 × 4 =
  22. 22.123 × 4 =
  23. 23.149 × 4 =
  24. 24.35 × 4 =
  25. 25.23 × 4 =
  26. 26.158 × 4 =
  27. 27.29 × 8 =
  28. 28.23 × 8 =
  29. 29.43 × 4 =
  30. 30.61 × 4 =
  31. 31.63 × 8 =
  32. 32.18 × 8 =
  33. 33.34 × 8 =
  34. 34.24 × 8 =
  35. 35.44 × 4 =
  36. 36.114 × 4 =
  37. 37.31 × 8 =
  38. 38.34 × 4 =
  39. 39.104 × 4 =
  40. 40.56 × 4 =

Answer key

  1. 308
  2. 528
  3. 88
  4. 312
  5. 544
  6. 640
  7. 188
  8. 488
  9. 360
  10. 192
  11. 76
  12. 344
  13. 368
  14. 304
  15. 256
  16. 240
  17. 376
  18. 360
  19. 372
  20. 540
  21. 588
  22. 492
  23. 596
  24. 140
  25. 92
  26. 632
  27. 232
  28. 184
  29. 172
  30. 244
  31. 504
  32. 144
  33. 272
  34. 192
  35. 176
  36. 456
  37. 248
  38. 136
  39. 416
  40. 224

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