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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 817 · 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. 2.132 × 4 =
  3. 3.124 × 4 =
  4. 4.45 × 8 =
  5. 5.73 × 8 =
  6. 6.35 × 8 =
  7. 7.47 × 4 =
  8. 8.40 × 8 =
  9. 9.32 × 8 =
  10. 10.73 × 8 =
  11. 11.53 × 8 =
  12. 12.57 × 8 =
  13. 13.26 × 8 =
  14. 14.47 × 8 =
  15. 15.20 × 8 =
  16. 16.27 × 8 =
  17. 17.42 × 4 =
  18. 18.17 × 8 =
  19. 19.33 × 8 =
  20. 20.35 × 8 =
  21. 21.86 × 4 =
  22. 22.111 × 4 =
  23. 23.159 × 4 =
  24. 24.111 × 4 =
  25. 25.140 × 4 =
  26. 26.36 × 8 =
  27. 27.93 × 4 =
  28. 28.50 × 8 =
  29. 29.80 × 4 =
  30. 30.130 × 4 =
  31. 31.33 × 8 =
  32. 32.60 × 8 =
  33. 33.24 × 4 =
  34. 34.138 × 4 =
  35. 35.156 × 4 =
  36. 36.49 × 8 =
  37. 37.20 × 4 =
  38. 38.50 × 4 =
  39. 39.27 × 4 =
  40. 40.29 × 8 =

Answer key

  1. 592
  2. 528
  3. 496
  4. 360
  5. 584
  6. 280
  7. 188
  8. 320
  9. 256
  10. 584
  11. 424
  12. 456
  13. 208
  14. 376
  15. 160
  16. 216
  17. 168
  18. 136
  19. 264
  20. 280
  21. 344
  22. 444
  23. 636
  24. 444
  25. 560
  26. 288
  27. 372
  28. 400
  29. 320
  30. 520
  31. 264
  32. 480
  33. 96
  34. 552
  35. 624
  36. 392
  37. 80
  38. 200
  39. 108
  40. 232

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