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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 861 · 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. 2.69 × 8 =
  3. 3.44 × 8 =
  4. 4.130 × 4 =
  5. 5.72 × 8 =
  6. 6.26 × 8 =
  7. 7.19 × 8 =
  8. 8.96 × 4 =
  9. 9.74 × 4 =
  10. 10.62 × 8 =
  11. 11.63 × 8 =
  12. 12.63 × 8 =
  13. 13.29 × 8 =
  14. 14.15 × 8 =
  15. 15.22 × 8 =
  16. 16.141 × 4 =
  17. 17.125 × 4 =
  18. 18.48 × 8 =
  19. 19.16 × 8 =
  20. 20.44 × 8 =
  21. 21.66 × 4 =
  22. 22.12 × 8 =
  23. 23.54 × 4 =
  24. 24.136 × 4 =
  25. 25.43 × 4 =
  26. 26.72 × 8 =
  27. 27.109 × 4 =
  28. 28.63 × 4 =
  29. 29.28 × 4 =
  30. 30.101 × 4 =
  31. 31.50 × 8 =
  32. 32.66 × 8 =
  33. 33.47 × 8 =
  34. 34.57 × 4 =
  35. 35.71 × 4 =
  36. 36.100 × 4 =
  37. 37.97 × 4 =
  38. 38.38 × 8 =
  39. 39.25 × 8 =
  40. 40.20 × 8 =

Answer key

  1. 544
  2. 552
  3. 352
  4. 520
  5. 576
  6. 208
  7. 152
  8. 384
  9. 296
  10. 496
  11. 504
  12. 504
  13. 232
  14. 120
  15. 176
  16. 564
  17. 500
  18. 384
  19. 128
  20. 352
  21. 264
  22. 96
  23. 216
  24. 544
  25. 172
  26. 576
  27. 436
  28. 252
  29. 112
  30. 404
  31. 400
  32. 528
  33. 376
  34. 228
  35. 284
  36. 400
  37. 388
  38. 304
  39. 200
  40. 160

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