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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 116 · 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. 1.28 × 4 =
  2. 2.68 × 4 =
  3. 3.63 × 8 =
  4. 4.58 × 4 =
  5. 5.18 × 8 =
  6. 6.129 × 4 =
  7. 7.45 × 8 =
  8. 8.52 × 8 =
  9. 9.21 × 4 =
  10. 10.59 × 8 =
  11. 11.67 × 8 =
  12. 12.114 × 4 =
  13. 13.153 × 4 =
  14. 14.18 × 8 =
  15. 15.30 × 8 =
  16. 16.150 × 4 =
  17. 17.35 × 8 =
  18. 18.17 × 8 =
  19. 19.12 × 8 =
  20. 20.149 × 4 =
  21. 21.22 × 8 =
  22. 22.17 × 4 =
  23. 23.47 × 8 =
  24. 24.15 × 4 =
  25. 25.54 × 8 =
  26. 26.158 × 4 =
  27. 27.158 × 4 =
  28. 28.71 × 8 =
  29. 29.20 × 4 =
  30. 30.44 × 8 =
  31. 31.42 × 8 =
  32. 32.76 × 4 =
  33. 33.38 × 8 =
  34. 34.33 × 4 =
  35. 35.18 × 4 =
  36. 36.105 × 4 =
  37. 37.62 × 4 =
  38. 38.143 × 4 =
  39. 39.118 × 4 =
  40. 40.65 × 8 =

Answer key

  1. 112
  2. 272
  3. 504
  4. 232
  5. 144
  6. 516
  7. 360
  8. 416
  9. 84
  10. 472
  11. 536
  12. 456
  13. 612
  14. 144
  15. 240
  16. 600
  17. 280
  18. 136
  19. 96
  20. 596
  21. 176
  22. 68
  23. 376
  24. 60
  25. 432
  26. 632
  27. 632
  28. 568
  29. 80
  30. 352
  31. 336
  32. 304
  33. 304
  34. 132
  35. 72
  36. 420
  37. 248
  38. 572
  39. 472
  40. 520

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