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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 185 · 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. 1.38 × 8 =
  2. 2.112 × 4 =
  3. 3.58 × 8 =
  4. 4.18 × 8 =
  5. 5.15 × 8 =
  6. 6.157 × 4 =
  7. 7.45 × 4 =
  8. 8.104 × 4 =
  9. 9.42 × 4 =
  10. 10.58 × 8 =
  11. 11.109 × 4 =
  12. 12.36 × 8 =
  13. 13.36 × 8 =
  14. 14.90 × 4 =
  15. 15.77 × 4 =
  16. 16.34 × 4 =
  17. 17.24 × 8 =
  18. 18.20 × 8 =
  19. 19.12 × 8 =
  20. 20.56 × 4 =
  21. 21.50 × 4 =
  22. 22.47 × 8 =
  23. 23.59 × 8 =
  24. 24.97 × 4 =
  25. 25.40 × 4 =
  26. 26.24 × 8 =
  27. 27.50 × 8 =
  28. 28.137 × 4 =
  29. 29.29 × 4 =
  30. 30.69 × 8 =
  31. 31.32 × 8 =
  32. 32.19 × 8 =
  33. 33.29 × 8 =
  34. 34.60 × 8 =
  35. 35.52 × 4 =
  36. 36.13 × 8 =
  37. 37.90 × 4 =
  38. 38.18 × 8 =
  39. 39.73 × 8 =
  40. 40.41 × 4 =

Answer key

  1. 304
  2. 448
  3. 464
  4. 144
  5. 120
  6. 628
  7. 180
  8. 416
  9. 168
  10. 464
  11. 436
  12. 288
  13. 288
  14. 360
  15. 308
  16. 136
  17. 192
  18. 160
  19. 96
  20. 224
  21. 200
  22. 376
  23. 472
  24. 388
  25. 160
  26. 192
  27. 400
  28. 548
  29. 116
  30. 552
  31. 256
  32. 152
  33. 232
  34. 480
  35. 208
  36. 104
  37. 360
  38. 144
  39. 584
  40. 164

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