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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 391 · 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. 1.57 × 8 =
  2. 2.32 × 4 =
  3. 3.153 × 4 =
  4. 4.73 × 4 =
  5. 5.22 × 4 =
  6. 6.124 × 4 =
  7. 7.43 × 8 =
  8. 8.54 × 4 =
  9. 9.55 × 4 =
  10. 10.74 × 8 =
  11. 11.57 × 8 =
  12. 12.120 × 4 =
  13. 13.37 × 4 =
  14. 14.47 × 8 =
  15. 15.102 × 4 =
  16. 16.32 × 8 =
  17. 17.51 × 8 =
  18. 18.69 × 8 =
  19. 19.34 × 4 =
  20. 20.64 × 8 =
  21. 21.146 × 4 =
  22. 22.17 × 4 =
  23. 23.58 × 8 =
  24. 24.13 × 8 =
  25. 25.39 × 8 =
  26. 26.50 × 4 =
  27. 27.17 × 4 =
  28. 28.36 × 4 =
  29. 29.103 × 4 =
  30. 30.52 × 8 =
  31. 31.31 × 8 =
  32. 32.40 × 8 =
  33. 33.37 × 4 =
  34. 34.20 × 4 =
  35. 35.141 × 4 =
  36. 36.115 × 4 =
  37. 37.74 × 8 =
  38. 38.22 × 8 =
  39. 39.13 × 8 =
  40. 40.99 × 4 =

Answer key

  1. 456
  2. 128
  3. 612
  4. 292
  5. 88
  6. 496
  7. 344
  8. 216
  9. 220
  10. 592
  11. 456
  12. 480
  13. 148
  14. 376
  15. 408
  16. 256
  17. 408
  18. 552
  19. 136
  20. 512
  21. 584
  22. 68
  23. 464
  24. 104
  25. 312
  26. 200
  27. 68
  28. 144
  29. 412
  30. 416
  31. 248
  32. 320
  33. 148
  34. 80
  35. 564
  36. 460
  37. 592
  38. 176
  39. 104
  40. 396

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