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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 681 · 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. 1.105 × 4 =
  2. 2.151 × 4 =
  3. 3.68 × 8 =
  4. 4.30 × 4 =
  5. 5.63 × 8 =
  6. 6.49 × 4 =
  7. 7.31 × 4 =
  8. 8.28 × 8 =
  9. 9.70 × 8 =
  10. 10.73 × 8 =
  11. 11.41 × 8 =
  12. 12.34 × 8 =
  13. 13.46 × 8 =
  14. 14.17 × 8 =
  15. 15.67 × 8 =
  16. 16.113 × 4 =
  17. 17.44 × 8 =
  18. 18.29 × 4 =
  19. 19.61 × 8 =
  20. 20.38 × 8 =
  21. 21.28 × 4 =
  22. 22.92 × 4 =
  23. 23.73 × 8 =
  24. 24.27 × 8 =
  25. 25.82 × 4 =
  26. 26.23 × 4 =
  27. 27.74 × 8 =
  28. 28.60 × 4 =
  29. 29.14 × 8 =
  30. 30.37 × 8 =
  31. 31.42 × 8 =
  32. 32.46 × 8 =
  33. 33.59 × 8 =
  34. 34.50 × 8 =
  35. 35.138 × 4 =
  36. 36.106 × 4 =
  37. 37.86 × 4 =
  38. 38.23 × 8 =
  39. 39.69 × 8 =
  40. 40.111 × 4 =

Answer key

  1. 420
  2. 604
  3. 544
  4. 120
  5. 504
  6. 196
  7. 124
  8. 224
  9. 560
  10. 584
  11. 328
  12. 272
  13. 368
  14. 136
  15. 536
  16. 452
  17. 352
  18. 116
  19. 488
  20. 304
  21. 112
  22. 368
  23. 584
  24. 216
  25. 328
  26. 92
  27. 592
  28. 240
  29. 112
  30. 296
  31. 336
  32. 368
  33. 472
  34. 400
  35. 552
  36. 424
  37. 344
  38. 184
  39. 552
  40. 444

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