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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 184 · 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. 1.65 × 8 =
  2. 2.26 × 8 =
  3. 3.32 × 8 =
  4. 4.115 × 4 =
  5. 5.139 × 4 =
  6. 6.28 × 8 =
  7. 7.25 × 4 =
  8. 8.73 × 8 =
  9. 9.38 × 8 =
  10. 10.56 × 8 =
  11. 11.16 × 8 =
  12. 12.136 × 4 =
  13. 13.127 × 4 =
  14. 14.148 × 4 =
  15. 15.27 × 4 =
  16. 16.36 × 8 =
  17. 17.45 × 8 =
  18. 18.137 × 4 =
  19. 19.74 × 8 =
  20. 20.19 × 4 =
  21. 21.137 × 4 =
  22. 22.15 × 8 =
  23. 23.28 × 8 =
  24. 24.23 × 8 =
  25. 25.48 × 4 =
  26. 26.77 × 4 =
  27. 27.19 × 4 =
  28. 28.50 × 8 =
  29. 29.135 × 4 =
  30. 30.39 × 4 =
  31. 31.142 × 4 =
  32. 32.45 × 4 =
  33. 33.71 × 8 =
  34. 34.20 × 4 =
  35. 35.14 × 8 =
  36. 36.64 × 8 =
  37. 37.31 × 8 =
  38. 38.13 × 8 =
  39. 39.38 × 8 =
  40. 40.50 × 8 =

Answer key

  1. 520
  2. 208
  3. 256
  4. 460
  5. 556
  6. 224
  7. 100
  8. 584
  9. 304
  10. 448
  11. 128
  12. 544
  13. 508
  14. 592
  15. 108
  16. 288
  17. 360
  18. 548
  19. 592
  20. 76
  21. 548
  22. 120
  23. 224
  24. 184
  25. 192
  26. 308
  27. 76
  28. 400
  29. 540
  30. 156
  31. 568
  32. 180
  33. 568
  34. 80
  35. 112
  36. 512
  37. 248
  38. 104
  39. 304
  40. 400

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