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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 134 · 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. 2.29 × 4 =
  3. 3.71 × 4 =
  4. 4.19 × 8 =
  5. 5.75 × 8 =
  6. 6.99 × 4 =
  7. 7.52 × 4 =
  8. 8.127 × 4 =
  9. 9.42 × 4 =
  10. 10.130 × 4 =
  11. 11.23 × 8 =
  12. 12.51 × 4 =
  13. 13.26 × 8 =
  14. 14.125 × 4 =
  15. 15.151 × 4 =
  16. 16.66 × 4 =
  17. 17.42 × 4 =
  18. 18.99 × 4 =
  19. 19.22 × 4 =
  20. 20.30 × 4 =
  21. 21.80 × 4 =
  22. 22.66 × 4 =
  23. 23.43 × 4 =
  24. 24.14 × 8 =
  25. 25.21 × 4 =
  26. 26.56 × 4 =
  27. 27.46 × 4 =
  28. 28.42 × 8 =
  29. 29.46 × 8 =
  30. 30.53 × 8 =
  31. 31.22 × 4 =
  32. 32.20 × 8 =
  33. 33.134 × 4 =
  34. 34.123 × 4 =
  35. 35.46 × 8 =
  36. 36.34 × 4 =
  37. 37.13 × 4 =
  38. 38.70 × 4 =
  39. 39.143 × 4 =
  40. 40.141 × 4 =

Answer key

  1. 152
  2. 116
  3. 284
  4. 152
  5. 600
  6. 396
  7. 208
  8. 508
  9. 168
  10. 520
  11. 184
  12. 204
  13. 208
  14. 500
  15. 604
  16. 264
  17. 168
  18. 396
  19. 88
  20. 120
  21. 320
  22. 264
  23. 172
  24. 112
  25. 84
  26. 224
  27. 184
  28. 336
  29. 368
  30. 424
  31. 88
  32. 160
  33. 536
  34. 492
  35. 368
  36. 136
  37. 52
  38. 280
  39. 572
  40. 564

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