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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 225 · 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. 1.31 × 8 =
  2. 2.25 × 4 =
  3. 3.148 × 4 =
  4. 4.61 × 8 =
  5. 5.28 × 8 =
  6. 6.41 × 8 =
  7. 7.71 × 8 =
  8. 8.117 × 4 =
  9. 9.53 × 8 =
  10. 10.70 × 4 =
  11. 11.56 × 8 =
  12. 12.120 × 4 =
  13. 13.48 × 8 =
  14. 14.86 × 4 =
  15. 15.119 × 4 =
  16. 16.98 × 4 =
  17. 17.87 × 4 =
  18. 18.13 × 8 =
  19. 19.144 × 4 =
  20. 20.66 × 8 =
  21. 21.140 × 4 =
  22. 22.19 × 8 =
  23. 23.117 × 4 =
  24. 24.28 × 4 =
  25. 25.51 × 8 =
  26. 26.44 × 8 =
  27. 27.86 × 4 =
  28. 28.56 × 4 =
  29. 29.18 × 8 =
  30. 30.115 × 4 =
  31. 31.80 × 4 =
  32. 32.19 × 8 =
  33. 33.58 × 8 =
  34. 34.45 × 4 =
  35. 35.25 × 8 =
  36. 36.148 × 4 =
  37. 37.76 × 4 =
  38. 38.68 × 4 =
  39. 39.143 × 4 =
  40. 40.32 × 8 =

Answer key

  1. 248
  2. 100
  3. 592
  4. 488
  5. 224
  6. 328
  7. 568
  8. 468
  9. 424
  10. 280
  11. 448
  12. 480
  13. 384
  14. 344
  15. 476
  16. 392
  17. 348
  18. 104
  19. 576
  20. 528
  21. 560
  22. 152
  23. 468
  24. 112
  25. 408
  26. 352
  27. 344
  28. 224
  29. 144
  30. 460
  31. 320
  32. 152
  33. 464
  34. 180
  35. 200
  36. 592
  37. 304
  38. 272
  39. 572
  40. 256

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