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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 833 · 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. 1.17 × 4 =
  2. 2.124 × 4 =
  3. 3.101 × 4 =
  4. 4.33 × 8 =
  5. 5.128 × 4 =
  6. 6.36 × 4 =
  7. 7.150 × 4 =
  8. 8.21 × 8 =
  9. 9.62 × 8 =
  10. 10.124 × 4 =
  11. 11.104 × 4 =
  12. 12.46 × 4 =
  13. 13.62 × 8 =
  14. 14.141 × 4 =
  15. 15.123 × 4 =
  16. 16.72 × 8 =
  17. 17.46 × 8 =
  18. 18.47 × 4 =
  19. 19.67 × 8 =
  20. 20.38 × 8 =
  21. 21.47 × 8 =
  22. 22.70 × 8 =
  23. 23.113 × 4 =
  24. 24.159 × 4 =
  25. 25.23 × 4 =
  26. 26.115 × 4 =
  27. 27.40 × 8 =
  28. 28.50 × 4 =
  29. 29.75 × 8 =
  30. 30.33 × 4 =
  31. 31.38 × 8 =
  32. 32.35 × 8 =
  33. 33.26 × 4 =
  34. 34.53 × 4 =
  35. 35.35 × 8 =
  36. 36.118 × 4 =
  37. 37.66 × 8 =
  38. 38.153 × 4 =
  39. 39.103 × 4 =
  40. 40.139 × 4 =

Answer key

  1. 68
  2. 496
  3. 404
  4. 264
  5. 512
  6. 144
  7. 600
  8. 168
  9. 496
  10. 496
  11. 416
  12. 184
  13. 496
  14. 564
  15. 492
  16. 576
  17. 368
  18. 188
  19. 536
  20. 304
  21. 376
  22. 560
  23. 452
  24. 636
  25. 92
  26. 460
  27. 320
  28. 200
  29. 600
  30. 132
  31. 304
  32. 280
  33. 104
  34. 212
  35. 280
  36. 472
  37. 528
  38. 612
  39. 412
  40. 556

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