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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 724 · 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. 1.56 × 4 =
  2. 2.92 × 4 =
  3. 3.48 × 8 =
  4. 4.120 × 4 =
  5. 5.25 × 8 =
  6. 6.75 × 8 =
  7. 7.52 × 8 =
  8. 8.41 × 4 =
  9. 9.44 × 8 =
  10. 10.13 × 4 =
  11. 11.17 × 4 =
  12. 12.31 × 4 =
  13. 13.146 × 4 =
  14. 14.45 × 8 =
  15. 15.103 × 4 =
  16. 16.135 × 4 =
  17. 17.66 × 4 =
  18. 18.104 × 4 =
  19. 19.18 × 4 =
  20. 20.24 × 8 =
  21. 21.46 × 4 =
  22. 22.31 × 8 =
  23. 23.67 × 8 =
  24. 24.47 × 8 =
  25. 25.154 × 4 =
  26. 26.25 × 8 =
  27. 27.84 × 4 =
  28. 28.73 × 8 =
  29. 29.30 × 8 =
  30. 30.72 × 4 =
  31. 31.39 × 8 =
  32. 32.49 × 4 =
  33. 33.37 × 4 =
  34. 34.12 × 8 =
  35. 35.25 × 8 =
  36. 36.21 × 8 =
  37. 37.69 × 8 =
  38. 38.86 × 4 =
  39. 39.17 × 8 =
  40. 40.70 × 8 =

Answer key

  1. 224
  2. 368
  3. 384
  4. 480
  5. 200
  6. 600
  7. 416
  8. 164
  9. 352
  10. 52
  11. 68
  12. 124
  13. 584
  14. 360
  15. 412
  16. 540
  17. 264
  18. 416
  19. 72
  20. 192
  21. 184
  22. 248
  23. 536
  24. 376
  25. 616
  26. 200
  27. 336
  28. 584
  29. 240
  30. 288
  31. 312
  32. 196
  33. 148
  34. 96
  35. 200
  36. 168
  37. 552
  38. 344
  39. 136
  40. 560

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