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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 920 · 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. 1.83 × 4 =
  2. 2.84 × 4 =
  3. 3.15 × 4 =
  4. 4.60 × 8 =
  5. 5.126 × 4 =
  6. 6.35 × 8 =
  7. 7.49 × 8 =
  8. 8.83 × 4 =
  9. 9.46 × 8 =
  10. 10.46 × 8 =
  11. 11.14 × 8 =
  12. 12.47 × 4 =
  13. 13.83 × 4 =
  14. 14.36 × 8 =
  15. 15.28 × 4 =
  16. 16.27 × 8 =
  17. 17.32 × 8 =
  18. 18.30 × 8 =
  19. 19.70 × 4 =
  20. 20.71 × 8 =
  21. 21.25 × 8 =
  22. 22.13 × 8 =
  23. 23.53 × 4 =
  24. 24.36 × 8 =
  25. 25.132 × 4 =
  26. 26.50 × 8 =
  27. 27.13 × 4 =
  28. 28.68 × 8 =
  29. 29.145 × 4 =
  30. 30.33 × 8 =
  31. 31.80 × 4 =
  32. 32.137 × 4 =
  33. 33.43 × 4 =
  34. 34.118 × 4 =
  35. 35.152 × 4 =
  36. 36.13 × 8 =
  37. 37.38 × 4 =
  38. 38.62 × 8 =
  39. 39.32 × 8 =
  40. 40.69 × 8 =

Answer key

  1. 332
  2. 336
  3. 60
  4. 480
  5. 504
  6. 280
  7. 392
  8. 332
  9. 368
  10. 368
  11. 112
  12. 188
  13. 332
  14. 288
  15. 112
  16. 216
  17. 256
  18. 240
  19. 280
  20. 568
  21. 200
  22. 104
  23. 212
  24. 288
  25. 528
  26. 400
  27. 52
  28. 544
  29. 580
  30. 264
  31. 320
  32. 548
  33. 172
  34. 472
  35. 608
  36. 104
  37. 152
  38. 496
  39. 256
  40. 552

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