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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 171 · 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. 1.26 × 4 =
  2. 2.78 × 4 =
  3. 3.38 × 4 =
  4. 4.92 × 4 =
  5. 5.14 × 8 =
  6. 6.14 × 4 =
  7. 7.12 × 8 =
  8. 8.104 × 4 =
  9. 9.57 × 4 =
  10. 10.66 × 4 =
  11. 11.31 × 8 =
  12. 12.40 × 8 =
  13. 13.25 × 8 =
  14. 14.34 × 8 =
  15. 15.140 × 4 =
  16. 16.40 × 8 =
  17. 17.24 × 8 =
  18. 18.14 × 8 =
  19. 19.48 × 4 =
  20. 20.56 × 8 =
  21. 21.52 × 4 =
  22. 22.64 × 8 =
  23. 23.130 × 4 =
  24. 24.62 × 4 =
  25. 25.51 × 8 =
  26. 26.73 × 4 =
  27. 27.115 × 4 =
  28. 28.34 × 8 =
  29. 29.92 × 4 =
  30. 30.115 × 4 =
  31. 31.13 × 4 =
  32. 32.15 × 8 =
  33. 33.129 × 4 =
  34. 34.31 × 8 =
  35. 35.31 × 8 =
  36. 36.12 × 8 =
  37. 37.50 × 8 =
  38. 38.55 × 8 =
  39. 39.41 × 4 =
  40. 40.74 × 4 =

Answer key

  1. 104
  2. 312
  3. 152
  4. 368
  5. 112
  6. 56
  7. 96
  8. 416
  9. 228
  10. 264
  11. 248
  12. 320
  13. 200
  14. 272
  15. 560
  16. 320
  17. 192
  18. 112
  19. 192
  20. 448
  21. 208
  22. 512
  23. 520
  24. 248
  25. 408
  26. 292
  27. 460
  28. 272
  29. 368
  30. 460
  31. 52
  32. 120
  33. 516
  34. 248
  35. 248
  36. 96
  37. 400
  38. 440
  39. 164
  40. 296

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