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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 416 · 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. 1.104 × 4 =
  2. 2.138 × 4 =
  3. 3.62 × 8 =
  4. 4.14 × 8 =
  5. 5.31 × 8 =
  6. 6.34 × 8 =
  7. 7.42 × 8 =
  8. 8.117 × 4 =
  9. 9.33 × 8 =
  10. 10.14 × 8 =
  11. 11.92 × 4 =
  12. 12.82 × 4 =
  13. 13.16 × 8 =
  14. 14.39 × 8 =
  15. 15.36 × 8 =
  16. 16.22 × 8 =
  17. 17.148 × 4 =
  18. 18.36 × 4 =
  19. 19.156 × 4 =
  20. 20.148 × 4 =
  21. 21.74 × 4 =
  22. 22.129 × 4 =
  23. 23.47 × 8 =
  24. 24.22 × 8 =
  25. 25.117 × 4 =
  26. 26.13 × 4 =
  27. 27.125 × 4 =
  28. 28.46 × 8 =
  29. 29.149 × 4 =
  30. 30.74 × 8 =
  31. 31.13 × 8 =
  32. 32.16 × 4 =
  33. 33.29 × 8 =
  34. 34.113 × 4 =
  35. 35.110 × 4 =
  36. 36.122 × 4 =
  37. 37.43 × 8 =
  38. 38.14 × 8 =
  39. 39.56 × 8 =
  40. 40.62 × 8 =

Answer key

  1. 416
  2. 552
  3. 496
  4. 112
  5. 248
  6. 272
  7. 336
  8. 468
  9. 264
  10. 112
  11. 368
  12. 328
  13. 128
  14. 312
  15. 288
  16. 176
  17. 592
  18. 144
  19. 624
  20. 592
  21. 296
  22. 516
  23. 376
  24. 176
  25. 468
  26. 52
  27. 500
  28. 368
  29. 596
  30. 592
  31. 104
  32. 64
  33. 232
  34. 452
  35. 440
  36. 488
  37. 344
  38. 112
  39. 448
  40. 496

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