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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 657 · 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. 1.66 × 8 =
  2. 2.85 × 4 =
  3. 3.82 × 4 =
  4. 4.20 × 8 =
  5. 5.159 × 4 =
  6. 6.41 × 8 =
  7. 7.20 × 8 =
  8. 8.57 × 8 =
  9. 9.58 × 8 =
  10. 10.54 × 8 =
  11. 11.109 × 4 =
  12. 12.96 × 4 =
  13. 13.33 × 8 =
  14. 14.15 × 8 =
  15. 15.72 × 4 =
  16. 16.56 × 4 =
  17. 17.68 × 4 =
  18. 18.129 × 4 =
  19. 19.68 × 8 =
  20. 20.50 × 8 =
  21. 21.38 × 4 =
  22. 22.20 × 4 =
  23. 23.67 × 8 =
  24. 24.15 × 8 =
  25. 25.71 × 4 =
  26. 26.119 × 4 =
  27. 27.52 × 8 =
  28. 28.123 × 4 =
  29. 29.41 × 8 =
  30. 30.24 × 4 =
  31. 31.28 × 8 =
  32. 32.21 × 8 =
  33. 33.33 × 8 =
  34. 34.64 × 8 =
  35. 35.140 × 4 =
  36. 36.47 × 8 =
  37. 37.16 × 4 =
  38. 38.132 × 4 =
  39. 39.45 × 8 =
  40. 40.44 × 8 =

Answer key

  1. 528
  2. 340
  3. 328
  4. 160
  5. 636
  6. 328
  7. 160
  8. 456
  9. 464
  10. 432
  11. 436
  12. 384
  13. 264
  14. 120
  15. 288
  16. 224
  17. 272
  18. 516
  19. 544
  20. 400
  21. 152
  22. 80
  23. 536
  24. 120
  25. 284
  26. 476
  27. 416
  28. 492
  29. 328
  30. 96
  31. 224
  32. 168
  33. 264
  34. 512
  35. 560
  36. 376
  37. 64
  38. 528
  39. 360
  40. 352

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