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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 480 · 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. 1.89 × 4 =
  2. 2.29 × 8 =
  3. 3.109 × 4 =
  4. 4.32 × 8 =
  5. 5.105 × 4 =
  6. 6.55 × 4 =
  7. 7.58 × 8 =
  8. 8.19 × 4 =
  9. 9.39 × 8 =
  10. 10.44 × 8 =
  11. 11.24 × 8 =
  12. 12.24 × 4 =
  13. 13.22 × 4 =
  14. 14.87 × 4 =
  15. 15.32 × 8 =
  16. 16.32 × 8 =
  17. 17.53 × 8 =
  18. 18.152 × 4 =
  19. 19.43 × 8 =
  20. 20.70 × 8 =
  21. 21.43 × 8 =
  22. 22.63 × 4 =
  23. 23.36 × 4 =
  24. 24.41 × 8 =
  25. 25.135 × 4 =
  26. 26.148 × 4 =
  27. 27.153 × 4 =
  28. 28.22 × 8 =
  29. 29.18 × 4 =
  30. 30.62 × 4 =
  31. 31.29 × 4 =
  32. 32.13 × 8 =
  33. 33.72 × 8 =
  34. 34.18 × 8 =
  35. 35.55 × 8 =
  36. 36.63 × 8 =
  37. 37.48 × 8 =
  38. 38.34 × 4 =
  39. 39.122 × 4 =
  40. 40.60 × 4 =

Answer key

  1. 356
  2. 232
  3. 436
  4. 256
  5. 420
  6. 220
  7. 464
  8. 76
  9. 312
  10. 352
  11. 192
  12. 96
  13. 88
  14. 348
  15. 256
  16. 256
  17. 424
  18. 608
  19. 344
  20. 560
  21. 344
  22. 252
  23. 144
  24. 328
  25. 540
  26. 592
  27. 612
  28. 176
  29. 72
  30. 248
  31. 116
  32. 104
  33. 576
  34. 144
  35. 440
  36. 504
  37. 384
  38. 136
  39. 488
  40. 240

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