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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 633 · 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. 1.31 × 8 =
  2. 2.123 × 4 =
  3. 3.22 × 4 =
  4. 4.13 × 8 =
  5. 5.75 × 8 =
  6. 6.32 × 8 =
  7. 7.53 × 4 =
  8. 8.113 × 4 =
  9. 9.59 × 8 =
  10. 10.73 × 8 =
  11. 11.61 × 8 =
  12. 12.74 × 8 =
  13. 13.18 × 4 =
  14. 14.58 × 8 =
  15. 15.150 × 4 =
  16. 16.12 × 8 =
  17. 17.45 × 8 =
  18. 18.28 × 8 =
  19. 19.68 × 4 =
  20. 20.101 × 4 =
  21. 21.60 × 4 =
  22. 22.24 × 8 =
  23. 23.21 × 8 =
  24. 24.73 × 8 =
  25. 25.76 × 4 =
  26. 26.86 × 4 =
  27. 27.24 × 8 =
  28. 28.44 × 8 =
  29. 29.130 × 4 =
  30. 30.64 × 8 =
  31. 31.17 × 4 =
  32. 32.39 × 8 =
  33. 33.16 × 4 =
  34. 34.14 × 8 =
  35. 35.53 × 4 =
  36. 36.136 × 4 =
  37. 37.108 × 4 =
  38. 38.132 × 4 =
  39. 39.28 × 4 =
  40. 40.46 × 8 =

Answer key

  1. 248
  2. 492
  3. 88
  4. 104
  5. 600
  6. 256
  7. 212
  8. 452
  9. 472
  10. 584
  11. 488
  12. 592
  13. 72
  14. 464
  15. 600
  16. 96
  17. 360
  18. 224
  19. 272
  20. 404
  21. 240
  22. 192
  23. 168
  24. 584
  25. 304
  26. 344
  27. 192
  28. 352
  29. 520
  30. 512
  31. 68
  32. 312
  33. 64
  34. 112
  35. 212
  36. 544
  37. 432
  38. 528
  39. 112
  40. 368

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