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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 342 · 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. 1.73 × 8 =
  2. 2.122 × 4 =
  3. 3.51 × 4 =
  4. 4.33 × 8 =
  5. 5.29 × 8 =
  6. 6.64 × 8 =
  7. 7.21 × 4 =
  8. 8.124 × 4 =
  9. 9.29 × 8 =
  10. 10.123 × 4 =
  11. 11.51 × 8 =
  12. 12.59 × 8 =
  13. 13.17 × 8 =
  14. 14.53 × 8 =
  15. 15.37 × 4 =
  16. 16.65 × 8 =
  17. 17.36 × 8 =
  18. 18.14 × 8 =
  19. 19.15 × 8 =
  20. 20.66 × 8 =
  21. 21.33 × 8 =
  22. 22.114 × 4 =
  23. 23.33 × 8 =
  24. 24.63 × 8 =
  25. 25.34 × 8 =
  26. 26.57 × 8 =
  27. 27.25 × 8 =
  28. 28.21 × 4 =
  29. 29.83 × 4 =
  30. 30.143 × 4 =
  31. 31.13 × 8 =
  32. 32.27 × 4 =
  33. 33.150 × 4 =
  34. 34.39 × 8 =
  35. 35.40 × 8 =
  36. 36.15 × 4 =
  37. 37.53 × 8 =
  38. 38.133 × 4 =
  39. 39.91 × 4 =
  40. 40.39 × 8 =

Answer key

  1. 584
  2. 488
  3. 204
  4. 264
  5. 232
  6. 512
  7. 84
  8. 496
  9. 232
  10. 492
  11. 408
  12. 472
  13. 136
  14. 424
  15. 148
  16. 520
  17. 288
  18. 112
  19. 120
  20. 528
  21. 264
  22. 456
  23. 264
  24. 504
  25. 272
  26. 456
  27. 200
  28. 84
  29. 332
  30. 572
  31. 104
  32. 108
  33. 600
  34. 312
  35. 320
  36. 60
  37. 424
  38. 532
  39. 364
  40. 312

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