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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 371 · 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. 1.68 × 8 =
  2. 2.13 × 8 =
  3. 3.68 × 8 =
  4. 4.99 × 4 =
  5. 5.19 × 8 =
  6. 6.31 × 4 =
  7. 7.153 × 4 =
  8. 8.28 × 8 =
  9. 9.30 × 8 =
  10. 10.107 × 4 =
  11. 11.74 × 8 =
  12. 12.16 × 4 =
  13. 13.146 × 4 =
  14. 14.34 × 8 =
  15. 15.29 × 4 =
  16. 16.26 × 4 =
  17. 17.33 × 8 =
  18. 18.96 × 4 =
  19. 19.55 × 8 =
  20. 20.51 × 8 =
  21. 21.96 × 4 =
  22. 22.54 × 8 =
  23. 23.97 × 4 =
  24. 24.49 × 8 =
  25. 25.38 × 4 =
  26. 26.59 × 8 =
  27. 27.104 × 4 =
  28. 28.24 × 8 =
  29. 29.15 × 8 =
  30. 30.22 × 8 =
  31. 31.71 × 4 =
  32. 32.47 × 8 =
  33. 33.33 × 8 =
  34. 34.14 × 8 =
  35. 35.69 × 8 =
  36. 36.37 × 4 =
  37. 37.54 × 8 =
  38. 38.36 × 4 =
  39. 39.61 × 8 =
  40. 40.64 × 8 =

Answer key

  1. 544
  2. 104
  3. 544
  4. 396
  5. 152
  6. 124
  7. 612
  8. 224
  9. 240
  10. 428
  11. 592
  12. 64
  13. 584
  14. 272
  15. 116
  16. 104
  17. 264
  18. 384
  19. 440
  20. 408
  21. 384
  22. 432
  23. 388
  24. 392
  25. 152
  26. 472
  27. 416
  28. 192
  29. 120
  30. 176
  31. 284
  32. 376
  33. 264
  34. 112
  35. 552
  36. 148
  37. 432
  38. 144
  39. 488
  40. 512

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