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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 353 · 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. 1.57 × 4 =
  2. 2.57 × 4 =
  3. 3.17 × 8 =
  4. 4.141 × 4 =
  5. 5.91 × 4 =
  6. 6.39 × 4 =
  7. 7.16 × 4 =
  8. 8.19 × 4 =
  9. 9.85 × 4 =
  10. 10.87 × 4 =
  11. 11.75 × 4 =
  12. 12.16 × 4 =
  13. 13.21 × 8 =
  14. 14.68 × 8 =
  15. 15.20 × 8 =
  16. 16.59 × 4 =
  17. 17.61 × 4 =
  18. 18.31 × 8 =
  19. 19.64 × 8 =
  20. 20.27 × 8 =
  21. 21.64 × 4 =
  22. 22.117 × 4 =
  23. 23.55 × 4 =
  24. 24.158 × 4 =
  25. 25.18 × 8 =
  26. 26.74 × 4 =
  27. 27.17 × 8 =
  28. 28.20 × 8 =
  29. 29.39 × 4 =
  30. 30.66 × 4 =
  31. 31.87 × 4 =
  32. 32.47 × 4 =
  33. 33.13 × 8 =
  34. 34.21 × 4 =
  35. 35.156 × 4 =
  36. 36.35 × 8 =
  37. 37.32 × 4 =
  38. 38.52 × 4 =
  39. 39.33 × 8 =
  40. 40.124 × 4 =

Answer key

  1. 228
  2. 228
  3. 136
  4. 564
  5. 364
  6. 156
  7. 64
  8. 76
  9. 340
  10. 348
  11. 300
  12. 64
  13. 168
  14. 544
  15. 160
  16. 236
  17. 244
  18. 248
  19. 512
  20. 216
  21. 256
  22. 468
  23. 220
  24. 632
  25. 144
  26. 296
  27. 136
  28. 160
  29. 156
  30. 264
  31. 348
  32. 188
  33. 104
  34. 84
  35. 624
  36. 280
  37. 128
  38. 208
  39. 264
  40. 496

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