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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 226 · 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. 1.100 × 4 =
  2. 2.51 × 4 =
  3. 3.137 × 4 =
  4. 4.30 × 4 =
  5. 5.129 × 4 =
  6. 6.23 × 8 =
  7. 7.120 × 4 =
  8. 8.75 × 8 =
  9. 9.45 × 4 =
  10. 10.23 × 8 =
  11. 11.12 × 8 =
  12. 12.40 × 8 =
  13. 13.51 × 4 =
  14. 14.45 × 8 =
  15. 15.20 × 4 =
  16. 16.59 × 8 =
  17. 17.19 × 4 =
  18. 18.51 × 8 =
  19. 19.31 × 4 =
  20. 20.54 × 8 =
  21. 21.12 × 8 =
  22. 22.24 × 8 =
  23. 23.22 × 8 =
  24. 24.42 × 4 =
  25. 25.34 × 8 =
  26. 26.46 × 8 =
  27. 27.157 × 4 =
  28. 28.66 × 8 =
  29. 29.69 × 4 =
  30. 30.66 × 8 =
  31. 31.38 × 8 =
  32. 32.57 × 8 =
  33. 33.56 × 8 =
  34. 34.39 × 4 =
  35. 35.68 × 8 =
  36. 36.97 × 4 =
  37. 37.43 × 4 =
  38. 38.56 × 4 =
  39. 39.49 × 4 =
  40. 40.143 × 4 =

Answer key

  1. 400
  2. 204
  3. 548
  4. 120
  5. 516
  6. 184
  7. 480
  8. 600
  9. 180
  10. 184
  11. 96
  12. 320
  13. 204
  14. 360
  15. 80
  16. 472
  17. 76
  18. 408
  19. 124
  20. 432
  21. 96
  22. 192
  23. 176
  24. 168
  25. 272
  26. 368
  27. 628
  28. 528
  29. 276
  30. 528
  31. 304
  32. 456
  33. 448
  34. 156
  35. 544
  36. 388
  37. 172
  38. 224
  39. 196
  40. 572

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