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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 283 · 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. 1.75 × 4 =
  2. 2.28 × 8 =
  3. 3.151 × 4 =
  4. 4.62 × 4 =
  5. 5.72 × 8 =
  6. 6.30 × 4 =
  7. 7.24 × 8 =
  8. 8.146 × 4 =
  9. 9.88 × 4 =
  10. 10.50 × 4 =
  11. 11.119 × 4 =
  12. 12.47 × 8 =
  13. 13.133 × 4 =
  14. 14.48 × 8 =
  15. 15.149 × 4 =
  16. 16.38 × 8 =
  17. 17.14 × 4 =
  18. 18.69 × 8 =
  19. 19.40 × 8 =
  20. 20.62 × 4 =
  21. 21.60 × 4 =
  22. 22.127 × 4 =
  23. 23.30 × 8 =
  24. 24.103 × 4 =
  25. 25.65 × 8 =
  26. 26.24 × 4 =
  27. 27.24 × 8 =
  28. 28.63 × 8 =
  29. 29.55 × 8 =
  30. 30.147 × 4 =
  31. 31.121 × 4 =
  32. 32.49 × 4 =
  33. 33.84 × 4 =
  34. 34.33 × 8 =
  35. 35.66 × 8 =
  36. 36.19 × 8 =
  37. 37.27 × 8 =
  38. 38.141 × 4 =
  39. 39.52 × 4 =
  40. 40.109 × 4 =

Answer key

  1. 300
  2. 224
  3. 604
  4. 248
  5. 576
  6. 120
  7. 192
  8. 584
  9. 352
  10. 200
  11. 476
  12. 376
  13. 532
  14. 384
  15. 596
  16. 304
  17. 56
  18. 552
  19. 320
  20. 248
  21. 240
  22. 508
  23. 240
  24. 412
  25. 520
  26. 96
  27. 192
  28. 504
  29. 440
  30. 588
  31. 484
  32. 196
  33. 336
  34. 264
  35. 528
  36. 152
  37. 216
  38. 564
  39. 208
  40. 436

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