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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 751 · 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. 1.19 × 8 =
  2. 2.28 × 8 =
  3. 3.22 × 8 =
  4. 4.18 × 8 =
  5. 5.33 × 8 =
  6. 6.18 × 8 =
  7. 7.29 × 4 =
  8. 8.97 × 4 =
  9. 9.46 × 4 =
  10. 10.41 × 8 =
  11. 11.134 × 4 =
  12. 12.27 × 8 =
  13. 13.51 × 4 =
  14. 14.22 × 8 =
  15. 15.49 × 8 =
  16. 16.94 × 4 =
  17. 17.62 × 4 =
  18. 18.113 × 4 =
  19. 19.69 × 8 =
  20. 20.66 × 8 =
  21. 21.85 × 4 =
  22. 22.75 × 4 =
  23. 23.72 × 8 =
  24. 24.20 × 4 =
  25. 25.60 × 8 =
  26. 26.44 × 8 =
  27. 27.27 × 8 =
  28. 28.59 × 4 =
  29. 29.141 × 4 =
  30. 30.130 × 4 =
  31. 31.144 × 4 =
  32. 32.12 × 8 =
  33. 33.13 × 4 =
  34. 34.67 × 8 =
  35. 35.72 × 4 =
  36. 36.15 × 8 =
  37. 37.19 × 8 =
  38. 38.152 × 4 =
  39. 39.90 × 4 =
  40. 40.80 × 4 =

Answer key

  1. 152
  2. 224
  3. 176
  4. 144
  5. 264
  6. 144
  7. 116
  8. 388
  9. 184
  10. 328
  11. 536
  12. 216
  13. 204
  14. 176
  15. 392
  16. 376
  17. 248
  18. 452
  19. 552
  20. 528
  21. 340
  22. 300
  23. 576
  24. 80
  25. 480
  26. 352
  27. 216
  28. 236
  29. 564
  30. 520
  31. 576
  32. 96
  33. 52
  34. 536
  35. 288
  36. 120
  37. 152
  38. 608
  39. 360
  40. 320

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