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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 76 · 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. 1.61 × 8 =
  2. 2.39 × 4 =
  3. 3.21 × 8 =
  4. 4.32 × 4 =
  5. 5.23 × 4 =
  6. 6.17 × 8 =
  7. 7.15 × 8 =
  8. 8.26 × 4 =
  9. 9.113 × 4 =
  10. 10.64 × 8 =
  11. 11.150 × 4 =
  12. 12.63 × 4 =
  13. 13.73 × 8 =
  14. 14.158 × 4 =
  15. 15.23 × 8 =
  16. 16.55 × 8 =
  17. 17.56 × 8 =
  18. 18.58 × 8 =
  19. 19.23 × 8 =
  20. 20.15 × 8 =
  21. 21.20 × 8 =
  22. 22.82 × 4 =
  23. 23.87 × 4 =
  24. 24.120 × 4 =
  25. 25.81 × 4 =
  26. 26.46 × 8 =
  27. 27.45 × 8 =
  28. 28.70 × 4 =
  29. 29.23 × 8 =
  30. 30.12 × 8 =
  31. 31.101 × 4 =
  32. 32.107 × 4 =
  33. 33.31 × 4 =
  34. 34.70 × 8 =
  35. 35.51 × 8 =
  36. 36.41 × 8 =
  37. 37.24 × 8 =
  38. 38.70 × 8 =
  39. 39.48 × 4 =
  40. 40.32 × 8 =

Answer key

  1. 488
  2. 156
  3. 168
  4. 128
  5. 92
  6. 136
  7. 120
  8. 104
  9. 452
  10. 512
  11. 600
  12. 252
  13. 584
  14. 632
  15. 184
  16. 440
  17. 448
  18. 464
  19. 184
  20. 120
  21. 160
  22. 328
  23. 348
  24. 480
  25. 324
  26. 368
  27. 360
  28. 280
  29. 184
  30. 96
  31. 404
  32. 428
  33. 124
  34. 560
  35. 408
  36. 328
  37. 192
  38. 560
  39. 192
  40. 256

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