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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 679 · 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. 1.137 × 4 =
  2. 2.132 × 4 =
  3. 3.136 × 4 =
  4. 4.153 × 4 =
  5. 5.21 × 8 =
  6. 6.74 × 8 =
  7. 7.36 × 4 =
  8. 8.28 × 8 =
  9. 9.78 × 4 =
  10. 10.80 × 4 =
  11. 11.59 × 8 =
  12. 12.13 × 4 =
  13. 13.121 × 4 =
  14. 14.159 × 4 =
  15. 15.15 × 4 =
  16. 16.38 × 4 =
  17. 17.36 × 8 =
  18. 18.102 × 4 =
  19. 19.29 × 8 =
  20. 20.59 × 8 =
  21. 21.48 × 8 =
  22. 22.114 × 4 =
  23. 23.36 × 4 =
  24. 24.158 × 4 =
  25. 25.91 × 4 =
  26. 26.69 × 8 =
  27. 27.73 × 4 =
  28. 28.46 × 8 =
  29. 29.45 × 4 =
  30. 30.40 × 8 =
  31. 31.126 × 4 =
  32. 32.35 × 8 =
  33. 33.42 × 4 =
  34. 34.140 × 4 =
  35. 35.73 × 8 =
  36. 36.160 × 4 =
  37. 37.41 × 8 =
  38. 38.15 × 4 =
  39. 39.70 × 8 =
  40. 40.153 × 4 =

Answer key

  1. 548
  2. 528
  3. 544
  4. 612
  5. 168
  6. 592
  7. 144
  8. 224
  9. 312
  10. 320
  11. 472
  12. 52
  13. 484
  14. 636
  15. 60
  16. 152
  17. 288
  18. 408
  19. 232
  20. 472
  21. 384
  22. 456
  23. 144
  24. 632
  25. 364
  26. 552
  27. 292
  28. 368
  29. 180
  30. 320
  31. 504
  32. 280
  33. 168
  34. 560
  35. 584
  36. 640
  37. 328
  38. 60
  39. 560
  40. 612

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