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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 307 · 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. 1.156 × 4 =
  2. 2.103 × 4 =
  3. 3.20 × 8 =
  4. 4.76 × 4 =
  5. 5.73 × 4 =
  6. 6.25 × 8 =
  7. 7.26 × 8 =
  8. 8.155 × 4 =
  9. 9.66 × 4 =
  10. 10.42 × 4 =
  11. 11.149 × 4 =
  12. 12.59 × 4 =
  13. 13.71 × 8 =
  14. 14.149 × 4 =
  15. 15.18 × 8 =
  16. 16.34 × 8 =
  17. 17.42 × 8 =
  18. 18.105 × 4 =
  19. 19.80 × 4 =
  20. 20.101 × 4 =
  21. 21.17 × 4 =
  22. 22.65 × 8 =
  23. 23.61 × 8 =
  24. 24.119 × 4 =
  25. 25.37 × 8 =
  26. 26.57 × 4 =
  27. 27.35 × 8 =
  28. 28.25 × 8 =
  29. 29.15 × 8 =
  30. 30.99 × 4 =
  31. 31.94 × 4 =
  32. 32.68 × 8 =
  33. 33.104 × 4 =
  34. 34.26 × 8 =
  35. 35.71 × 8 =
  36. 36.19 × 8 =
  37. 37.131 × 4 =
  38. 38.57 × 4 =
  39. 39.127 × 4 =
  40. 40.12 × 8 =

Answer key

  1. 624
  2. 412
  3. 160
  4. 304
  5. 292
  6. 200
  7. 208
  8. 620
  9. 264
  10. 168
  11. 596
  12. 236
  13. 568
  14. 596
  15. 144
  16. 272
  17. 336
  18. 420
  19. 320
  20. 404
  21. 68
  22. 520
  23. 488
  24. 476
  25. 296
  26. 228
  27. 280
  28. 200
  29. 120
  30. 396
  31. 376
  32. 544
  33. 416
  34. 208
  35. 568
  36. 152
  37. 524
  38. 228
  39. 508
  40. 96

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