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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 216 · 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. 1.66 × 8 =
  2. 2.17 × 8 =
  3. 3.57 × 8 =
  4. 4.52 × 8 =
  5. 5.32 × 8 =
  6. 6.98 × 4 =
  7. 7.52 × 8 =
  8. 8.45 × 4 =
  9. 9.34 × 8 =
  10. 10.80 × 4 =
  11. 11.52 × 8 =
  12. 12.63 × 8 =
  13. 13.92 × 4 =
  14. 14.65 × 8 =
  15. 15.26 × 8 =
  16. 16.39 × 4 =
  17. 17.18 × 4 =
  18. 18.51 × 8 =
  19. 19.66 × 4 =
  20. 20.36 × 4 =
  21. 21.27 × 8 =
  22. 22.44 × 8 =
  23. 23.89 × 4 =
  24. 24.69 × 8 =
  25. 25.140 × 4 =
  26. 26.23 × 4 =
  27. 27.41 × 4 =
  28. 28.142 × 4 =
  29. 29.29 × 4 =
  30. 30.98 × 4 =
  31. 31.61 × 4 =
  32. 32.56 × 8 =
  33. 33.58 × 4 =
  34. 34.29 × 4 =
  35. 35.99 × 4 =
  36. 36.44 × 8 =
  37. 37.150 × 4 =
  38. 38.153 × 4 =
  39. 39.36 × 4 =
  40. 40.71 × 8 =

Answer key

  1. 528
  2. 136
  3. 456
  4. 416
  5. 256
  6. 392
  7. 416
  8. 180
  9. 272
  10. 320
  11. 416
  12. 504
  13. 368
  14. 520
  15. 208
  16. 156
  17. 72
  18. 408
  19. 264
  20. 144
  21. 216
  22. 352
  23. 356
  24. 552
  25. 560
  26. 92
  27. 164
  28. 568
  29. 116
  30. 392
  31. 244
  32. 448
  33. 232
  34. 116
  35. 396
  36. 352
  37. 600
  38. 612
  39. 144
  40. 568

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