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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 409 · 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. 1.18 × 4 =
  2. 2.62 × 8 =
  3. 3.36 × 4 =
  4. 4.112 × 4 =
  5. 5.105 × 4 =
  6. 6.76 × 4 =
  7. 7.22 × 8 =
  8. 8.22 × 4 =
  9. 9.31 × 4 =
  10. 10.17 × 8 =
  11. 11.113 × 4 =
  12. 12.85 × 4 =
  13. 13.117 × 4 =
  14. 14.94 × 4 =
  15. 15.50 × 8 =
  16. 16.54 × 8 =
  17. 17.21 × 8 =
  18. 18.13 × 8 =
  19. 19.36 × 4 =
  20. 20.27 × 4 =
  21. 21.15 × 4 =
  22. 22.33 × 4 =
  23. 23.158 × 4 =
  24. 24.129 × 4 =
  25. 25.34 × 8 =
  26. 26.73 × 4 =
  27. 27.45 × 4 =
  28. 28.28 × 4 =
  29. 29.47 × 4 =
  30. 30.101 × 4 =
  31. 31.108 × 4 =
  32. 32.90 × 4 =
  33. 33.89 × 4 =
  34. 34.19 × 8 =
  35. 35.48 × 8 =
  36. 36.131 × 4 =
  37. 37.67 × 8 =
  38. 38.63 × 8 =
  39. 39.131 × 4 =
  40. 40.15 × 8 =

Answer key

  1. 72
  2. 496
  3. 144
  4. 448
  5. 420
  6. 304
  7. 176
  8. 88
  9. 124
  10. 136
  11. 452
  12. 340
  13. 468
  14. 376
  15. 400
  16. 432
  17. 168
  18. 104
  19. 144
  20. 108
  21. 60
  22. 132
  23. 632
  24. 516
  25. 272
  26. 292
  27. 180
  28. 112
  29. 188
  30. 404
  31. 432
  32. 360
  33. 356
  34. 152
  35. 384
  36. 524
  37. 536
  38. 504
  39. 524
  40. 120

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