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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 246 · 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. 1.31 × 8 =
  2. 2.118 × 4 =
  3. 3.127 × 4 =
  4. 4.24 × 8 =
  5. 5.19 × 8 =
  6. 6.84 × 4 =
  7. 7.40 × 4 =
  8. 8.71 × 4 =
  9. 9.91 × 4 =
  10. 10.104 × 4 =
  11. 11.27 × 8 =
  12. 12.52 × 4 =
  13. 13.65 × 8 =
  14. 14.51 × 8 =
  15. 15.122 × 4 =
  16. 16.148 × 4 =
  17. 17.75 × 8 =
  18. 18.19 × 8 =
  19. 19.118 × 4 =
  20. 20.127 × 4 =
  21. 21.78 × 4 =
  22. 22.54 × 8 =
  23. 23.48 × 4 =
  24. 24.158 × 4 =
  25. 25.75 × 8 =
  26. 26.92 × 4 =
  27. 27.138 × 4 =
  28. 28.70 × 4 =
  29. 29.48 × 4 =
  30. 30.83 × 4 =
  31. 31.12 × 8 =
  32. 32.115 × 4 =
  33. 33.15 × 4 =
  34. 34.90 × 4 =
  35. 35.133 × 4 =
  36. 36.51 × 8 =
  37. 37.21 × 8 =
  38. 38.71 × 4 =
  39. 39.67 × 8 =
  40. 40.33 × 4 =

Answer key

  1. 248
  2. 472
  3. 508
  4. 192
  5. 152
  6. 336
  7. 160
  8. 284
  9. 364
  10. 416
  11. 216
  12. 208
  13. 520
  14. 408
  15. 488
  16. 592
  17. 600
  18. 152
  19. 472
  20. 508
  21. 312
  22. 432
  23. 192
  24. 632
  25. 600
  26. 368
  27. 552
  28. 280
  29. 192
  30. 332
  31. 96
  32. 460
  33. 60
  34. 360
  35. 532
  36. 408
  37. 168
  38. 284
  39. 536
  40. 132

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