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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 951 · 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. 1.83 × 4 =
  2. 2.20 × 8 =
  3. 3.31 × 4 =
  4. 4.101 × 4 =
  5. 5.73 × 4 =
  6. 6.104 × 4 =
  7. 7.50 × 8 =
  8. 8.104 × 4 =
  9. 9.41 × 8 =
  10. 10.36 × 8 =
  11. 11.92 × 4 =
  12. 12.126 × 4 =
  13. 13.35 × 8 =
  14. 14.71 × 4 =
  15. 15.155 × 4 =
  16. 16.133 × 4 =
  17. 17.40 × 8 =
  18. 18.131 × 4 =
  19. 19.64 × 8 =
  20. 20.113 × 4 =
  21. 21.19 × 8 =
  22. 22.52 × 4 =
  23. 23.17 × 4 =
  24. 24.53 × 4 =
  25. 25.31 × 8 =
  26. 26.82 × 4 =
  27. 27.26 × 4 =
  28. 28.94 × 4 =
  29. 29.89 × 4 =
  30. 30.41 × 8 =
  31. 31.61 × 8 =
  32. 32.106 × 4 =
  33. 33.145 × 4 =
  34. 34.146 × 4 =
  35. 35.19 × 8 =
  36. 36.138 × 4 =
  37. 37.56 × 8 =
  38. 38.61 × 8 =
  39. 39.78 × 4 =
  40. 40.45 × 8 =

Answer key

  1. 332
  2. 160
  3. 124
  4. 404
  5. 292
  6. 416
  7. 400
  8. 416
  9. 328
  10. 288
  11. 368
  12. 504
  13. 280
  14. 284
  15. 620
  16. 532
  17. 320
  18. 524
  19. 512
  20. 452
  21. 152
  22. 208
  23. 68
  24. 212
  25. 248
  26. 328
  27. 104
  28. 376
  29. 356
  30. 328
  31. 488
  32. 424
  33. 580
  34. 584
  35. 152
  36. 552
  37. 448
  38. 488
  39. 312
  40. 360

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