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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 524 · 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. 1.65 × 8 =
  2. 2.112 × 4 =
  3. 3.67 × 8 =
  4. 4.21 × 4 =
  5. 5.34 × 4 =
  6. 6.26 × 4 =
  7. 7.33 × 8 =
  8. 8.54 × 4 =
  9. 9.16 × 8 =
  10. 10.25 × 4 =
  11. 11.31 × 4 =
  12. 12.96 × 4 =
  13. 13.56 × 8 =
  14. 14.84 × 4 =
  15. 15.75 × 4 =
  16. 16.24 × 8 =
  17. 17.82 × 4 =
  18. 18.30 × 4 =
  19. 19.16 × 8 =
  20. 20.109 × 4 =
  21. 21.68 × 4 =
  22. 22.26 × 8 =
  23. 23.29 × 8 =
  24. 24.72 × 4 =
  25. 25.72 × 8 =
  26. 26.55 × 4 =
  27. 27.156 × 4 =
  28. 28.24 × 4 =
  29. 29.65 × 8 =
  30. 30.38 × 4 =
  31. 31.39 × 4 =
  32. 32.48 × 8 =
  33. 33.150 × 4 =
  34. 34.30 × 8 =
  35. 35.13 × 8 =
  36. 36.43 × 4 =
  37. 37.60 × 4 =
  38. 38.13 × 8 =
  39. 39.39 × 8 =
  40. 40.12 × 8 =

Answer key

  1. 520
  2. 448
  3. 536
  4. 84
  5. 136
  6. 104
  7. 264
  8. 216
  9. 128
  10. 100
  11. 124
  12. 384
  13. 448
  14. 336
  15. 300
  16. 192
  17. 328
  18. 120
  19. 128
  20. 436
  21. 272
  22. 208
  23. 232
  24. 288
  25. 576
  26. 220
  27. 624
  28. 96
  29. 520
  30. 152
  31. 156
  32. 384
  33. 600
  34. 240
  35. 104
  36. 172
  37. 240
  38. 104
  39. 312
  40. 96

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