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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 841 · 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. 1.112 × 4 =
  2. 2.104 × 4 =
  3. 3.63 × 8 =
  4. 4.17 × 8 =
  5. 5.75 × 8 =
  6. 6.47 × 8 =
  7. 7.100 × 4 =
  8. 8.36 × 4 =
  9. 9.68 × 8 =
  10. 10.23 × 8 =
  11. 11.85 × 4 =
  12. 12.37 × 8 =
  13. 13.70 × 8 =
  14. 14.47 × 8 =
  15. 15.47 × 4 =
  16. 16.35 × 8 =
  17. 17.67 × 4 =
  18. 18.149 × 4 =
  19. 19.143 × 4 =
  20. 20.76 × 4 =
  21. 21.20 × 4 =
  22. 22.159 × 4 =
  23. 23.22 × 8 =
  24. 24.28 × 8 =
  25. 25.67 × 4 =
  26. 26.26 × 8 =
  27. 27.83 × 4 =
  28. 28.39 × 8 =
  29. 29.22 × 8 =
  30. 30.65 × 4 =
  31. 31.31 × 8 =
  32. 32.128 × 4 =
  33. 33.71 × 8 =
  34. 34.32 × 8 =
  35. 35.23 × 8 =
  36. 36.56 × 4 =
  37. 37.43 × 8 =
  38. 38.133 × 4 =
  39. 39.31 × 4 =
  40. 40.68 × 4 =

Answer key

  1. 448
  2. 416
  3. 504
  4. 136
  5. 600
  6. 376
  7. 400
  8. 144
  9. 544
  10. 184
  11. 340
  12. 296
  13. 560
  14. 376
  15. 188
  16. 280
  17. 268
  18. 596
  19. 572
  20. 304
  21. 80
  22. 636
  23. 176
  24. 224
  25. 268
  26. 208
  27. 332
  28. 312
  29. 176
  30. 260
  31. 248
  32. 512
  33. 568
  34. 256
  35. 184
  36. 224
  37. 344
  38. 532
  39. 124
  40. 272

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