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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 256 · 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. 1.30 × 8 =
  2. 2.69 × 8 =
  3. 3.51 × 8 =
  4. 4.40 × 8 =
  5. 5.142 × 4 =
  6. 6.47 × 8 =
  7. 7.103 × 4 =
  8. 8.51 × 8 =
  9. 9.24 × 8 =
  10. 10.36 × 4 =
  11. 11.137 × 4 =
  12. 12.59 × 8 =
  13. 13.16 × 8 =
  14. 14.24 × 8 =
  15. 15.21 × 8 =
  16. 16.35 × 8 =
  17. 17.86 × 4 =
  18. 18.51 × 4 =
  19. 19.41 × 8 =
  20. 20.100 × 4 =
  21. 21.42 × 8 =
  22. 22.132 × 4 =
  23. 23.71 × 8 =
  24. 24.141 × 4 =
  25. 25.121 × 4 =
  26. 26.22 × 8 =
  27. 27.69 × 4 =
  28. 28.118 × 4 =
  29. 29.37 × 8 =
  30. 30.27 × 8 =
  31. 31.61 × 8 =
  32. 32.14 × 8 =
  33. 33.43 × 4 =
  34. 34.30 × 8 =
  35. 35.55 × 4 =
  36. 36.25 × 8 =
  37. 37.28 × 8 =
  38. 38.121 × 4 =
  39. 39.37 × 8 =
  40. 40.140 × 4 =

Answer key

  1. 240
  2. 552
  3. 408
  4. 320
  5. 568
  6. 376
  7. 412
  8. 408
  9. 192
  10. 144
  11. 548
  12. 472
  13. 128
  14. 192
  15. 168
  16. 280
  17. 344
  18. 204
  19. 328
  20. 400
  21. 336
  22. 528
  23. 568
  24. 564
  25. 484
  26. 176
  27. 276
  28. 472
  29. 296
  30. 216
  31. 488
  32. 112
  33. 172
  34. 240
  35. 220
  36. 200
  37. 224
  38. 484
  39. 296
  40. 560

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