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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 139 · 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. 1.148 × 4 =
  2. 2.43 × 4 =
  3. 3.83 × 4 =
  4. 4.95 × 4 =
  5. 5.62 × 8 =
  6. 6.91 × 4 =
  7. 7.29 × 4 =
  8. 8.66 × 8 =
  9. 9.25 × 8 =
  10. 10.44 × 8 =
  11. 11.88 × 4 =
  12. 12.93 × 4 =
  13. 13.25 × 8 =
  14. 14.54 × 4 =
  15. 15.14 × 4 =
  16. 16.62 × 8 =
  17. 17.19 × 8 =
  18. 18.76 × 4 =
  19. 19.48 × 8 =
  20. 20.41 × 8 =
  21. 21.52 × 8 =
  22. 22.63 × 4 =
  23. 23.149 × 4 =
  24. 24.51 × 4 =
  25. 25.43 × 8 =
  26. 26.150 × 4 =
  27. 27.15 × 8 =
  28. 28.160 × 4 =
  29. 29.107 × 4 =
  30. 30.62 × 8 =
  31. 31.97 × 4 =
  32. 32.62 × 4 =
  33. 33.24 × 8 =
  34. 34.17 × 8 =
  35. 35.24 × 8 =
  36. 36.39 × 8 =
  37. 37.31 × 4 =
  38. 38.72 × 8 =
  39. 39.16 × 4 =
  40. 40.67 × 8 =

Answer key

  1. 592
  2. 172
  3. 332
  4. 380
  5. 496
  6. 364
  7. 116
  8. 528
  9. 200
  10. 352
  11. 352
  12. 372
  13. 200
  14. 216
  15. 56
  16. 496
  17. 152
  18. 304
  19. 384
  20. 328
  21. 416
  22. 252
  23. 596
  24. 204
  25. 344
  26. 600
  27. 120
  28. 640
  29. 428
  30. 496
  31. 388
  32. 248
  33. 192
  34. 136
  35. 192
  36. 312
  37. 124
  38. 576
  39. 64
  40. 536

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