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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 805 · 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. 1.29 × 8 =
  2. 2.34 × 8 =
  3. 3.68 × 4 =
  4. 4.118 × 4 =
  5. 5.25 × 4 =
  6. 6.155 × 4 =
  7. 7.80 × 4 =
  8. 8.56 × 8 =
  9. 9.63 × 4 =
  10. 10.67 × 4 =
  11. 11.148 × 4 =
  12. 12.68 × 8 =
  13. 13.34 × 8 =
  14. 14.46 × 8 =
  15. 15.18 × 8 =
  16. 16.48 × 4 =
  17. 17.40 × 4 =
  18. 18.34 × 4 =
  19. 19.60 × 8 =
  20. 20.87 × 4 =
  21. 21.120 × 4 =
  22. 22.66 × 8 =
  23. 23.123 × 4 =
  24. 24.136 × 4 =
  25. 25.13 × 8 =
  26. 26.69 × 8 =
  27. 27.119 × 4 =
  28. 28.39 × 4 =
  29. 29.154 × 4 =
  30. 30.25 × 4 =
  31. 31.92 × 4 =
  32. 32.13 × 8 =
  33. 33.55 × 4 =
  34. 34.143 × 4 =
  35. 35.48 × 4 =
  36. 36.157 × 4 =
  37. 37.83 × 4 =
  38. 38.61 × 8 =
  39. 39.30 × 8 =
  40. 40.45 × 8 =

Answer key

  1. 232
  2. 272
  3. 272
  4. 472
  5. 100
  6. 620
  7. 320
  8. 448
  9. 252
  10. 268
  11. 592
  12. 544
  13. 272
  14. 368
  15. 144
  16. 192
  17. 160
  18. 136
  19. 480
  20. 348
  21. 480
  22. 528
  23. 492
  24. 544
  25. 104
  26. 552
  27. 476
  28. 156
  29. 616
  30. 100
  31. 368
  32. 104
  33. 220
  34. 572
  35. 192
  36. 628
  37. 332
  38. 488
  39. 240
  40. 360

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