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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 650 · 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. 1.38 × 8 =
  2. 2.31 × 8 =
  3. 3.132 × 4 =
  4. 4.85 × 4 =
  5. 5.51 × 4 =
  6. 6.122 × 4 =
  7. 7.109 × 4 =
  8. 8.91 × 4 =
  9. 9.68 × 8 =
  10. 10.66 × 8 =
  11. 11.142 × 4 =
  12. 12.113 × 4 =
  13. 13.25 × 8 =
  14. 14.58 × 8 =
  15. 15.55 × 4 =
  16. 16.46 × 4 =
  17. 17.64 × 8 =
  18. 18.118 × 4 =
  19. 19.34 × 8 =
  20. 20.98 × 4 =
  21. 21.36 × 8 =
  22. 22.19 × 8 =
  23. 23.42 × 4 =
  24. 24.34 × 4 =
  25. 25.36 × 8 =
  26. 26.65 × 8 =
  27. 27.140 × 4 =
  28. 28.52 × 8 =
  29. 29.21 × 8 =
  30. 30.67 × 4 =
  31. 31.66 × 4 =
  32. 32.154 × 4 =
  33. 33.44 × 4 =
  34. 34.150 × 4 =
  35. 35.95 × 4 =
  36. 36.69 × 4 =
  37. 37.29 × 4 =
  38. 38.26 × 4 =
  39. 39.112 × 4 =
  40. 40.84 × 4 =

Answer key

  1. 304
  2. 248
  3. 528
  4. 340
  5. 204
  6. 488
  7. 436
  8. 364
  9. 544
  10. 528
  11. 568
  12. 452
  13. 200
  14. 464
  15. 220
  16. 184
  17. 512
  18. 472
  19. 272
  20. 392
  21. 288
  22. 152
  23. 168
  24. 136
  25. 288
  26. 520
  27. 560
  28. 416
  29. 168
  30. 268
  31. 264
  32. 616
  33. 176
  34. 600
  35. 380
  36. 276
  37. 116
  38. 104
  39. 448
  40. 336

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