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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 413 · 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. 1.25 × 8 =
  2. 2.60 × 8 =
  3. 3.12 × 8 =
  4. 4.50 × 4 =
  5. 5.145 × 4 =
  6. 6.84 × 4 =
  7. 7.64 × 4 =
  8. 8.30 × 4 =
  9. 9.41 × 4 =
  10. 10.69 × 8 =
  11. 11.42 × 4 =
  12. 12.37 × 4 =
  13. 13.20 × 4 =
  14. 14.56 × 8 =
  15. 15.110 × 4 =
  16. 16.30 × 8 =
  17. 17.116 × 4 =
  18. 18.62 × 8 =
  19. 19.55 × 8 =
  20. 20.74 × 8 =
  21. 21.30 × 8 =
  22. 22.49 × 4 =
  23. 23.74 × 4 =
  24. 24.12 × 8 =
  25. 25.81 × 4 =
  26. 26.58 × 4 =
  27. 27.29 × 8 =
  28. 28.101 × 4 =
  29. 29.137 × 4 =
  30. 30.39 × 4 =
  31. 31.69 × 4 =
  32. 32.135 × 4 =
  33. 33.44 × 8 =
  34. 34.55 × 8 =
  35. 35.127 × 4 =
  36. 36.65 × 4 =
  37. 37.27 × 4 =
  38. 38.21 × 8 =
  39. 39.64 × 8 =
  40. 40.105 × 4 =

Answer key

  1. 200
  2. 480
  3. 96
  4. 200
  5. 580
  6. 336
  7. 256
  8. 120
  9. 164
  10. 552
  11. 168
  12. 148
  13. 80
  14. 448
  15. 440
  16. 240
  17. 464
  18. 496
  19. 440
  20. 592
  21. 240
  22. 196
  23. 296
  24. 96
  25. 324
  26. 232
  27. 232
  28. 404
  29. 548
  30. 156
  31. 276
  32. 540
  33. 352
  34. 440
  35. 508
  36. 260
  37. 108
  38. 168
  39. 512
  40. 420

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