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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 924 · 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. 1.141 × 4 =
  2. 2.117 × 4 =
  3. 3.27 × 8 =
  4. 4.141 × 4 =
  5. 5.36 × 4 =
  6. 6.68 × 8 =
  7. 7.40 × 8 =
  8. 8.136 × 4 =
  9. 9.26 × 4 =
  10. 10.63 × 4 =
  11. 11.71 × 4 =
  12. 12.85 × 4 =
  13. 13.67 × 8 =
  14. 14.58 × 4 =
  15. 15.153 × 4 =
  16. 16.54 × 4 =
  17. 17.44 × 8 =
  18. 18.94 × 4 =
  19. 19.79 × 4 =
  20. 20.70 × 4 =
  21. 21.13 × 8 =
  22. 22.129 × 4 =
  23. 23.35 × 8 =
  24. 24.132 × 4 =
  25. 25.66 × 8 =
  26. 26.40 × 8 =
  27. 27.31 × 8 =
  28. 28.68 × 8 =
  29. 29.46 × 8 =
  30. 30.42 × 4 =
  31. 31.17 × 8 =
  32. 32.68 × 4 =
  33. 33.65 × 8 =
  34. 34.24 × 4 =
  35. 35.51 × 8 =
  36. 36.13 × 4 =
  37. 37.20 × 8 =
  38. 38.41 × 4 =
  39. 39.58 × 4 =
  40. 40.83 × 4 =

Answer key

  1. 564
  2. 468
  3. 216
  4. 564
  5. 144
  6. 544
  7. 320
  8. 544
  9. 104
  10. 252
  11. 284
  12. 340
  13. 536
  14. 232
  15. 612
  16. 216
  17. 352
  18. 376
  19. 316
  20. 280
  21. 104
  22. 516
  23. 280
  24. 528
  25. 528
  26. 320
  27. 248
  28. 544
  29. 368
  30. 168
  31. 136
  32. 272
  33. 520
  34. 96
  35. 408
  36. 52
  37. 160
  38. 164
  39. 232
  40. 332

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