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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 251 · 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. 1.89 × 4 =
  2. 2.50 × 4 =
  3. 3.42 × 4 =
  4. 4.122 × 4 =
  5. 5.39 × 4 =
  6. 6.33 × 4 =
  7. 7.157 × 4 =
  8. 8.16 × 8 =
  9. 9.16 × 4 =
  10. 10.12 × 8 =
  11. 11.37 × 4 =
  12. 12.48 × 4 =
  13. 13.113 × 4 =
  14. 14.47 × 4 =
  15. 15.16 × 8 =
  16. 16.55 × 8 =
  17. 17.139 × 4 =
  18. 18.48 × 8 =
  19. 19.71 × 4 =
  20. 20.44 × 8 =
  21. 21.56 × 8 =
  22. 22.19 × 4 =
  23. 23.70 × 4 =
  24. 24.49 × 4 =
  25. 25.30 × 8 =
  26. 26.23 × 4 =
  27. 27.41 × 8 =
  28. 28.43 × 4 =
  29. 29.140 × 4 =
  30. 30.41 × 8 =
  31. 31.93 × 4 =
  32. 32.67 × 4 =
  33. 33.48 × 8 =
  34. 34.46 × 8 =
  35. 35.65 × 4 =
  36. 36.121 × 4 =
  37. 37.14 × 8 =
  38. 38.33 × 4 =
  39. 39.42 × 8 =
  40. 40.15 × 4 =

Answer key

  1. 356
  2. 200
  3. 168
  4. 488
  5. 156
  6. 132
  7. 628
  8. 128
  9. 64
  10. 96
  11. 148
  12. 192
  13. 452
  14. 188
  15. 128
  16. 440
  17. 556
  18. 384
  19. 284
  20. 352
  21. 448
  22. 76
  23. 280
  24. 196
  25. 240
  26. 92
  27. 328
  28. 172
  29. 560
  30. 328
  31. 372
  32. 268
  33. 384
  34. 368
  35. 260
  36. 484
  37. 112
  38. 132
  39. 336
  40. 60

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