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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 169 · 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. 1.74 × 8 =
  2. 2.150 × 4 =
  3. 3.56 × 8 =
  4. 4.13 × 8 =
  5. 5.51 × 8 =
  6. 6.14 × 8 =
  7. 7.51 × 8 =
  8. 8.13 × 8 =
  9. 9.15 × 8 =
  10. 10.17 × 8 =
  11. 11.28 × 8 =
  12. 12.81 × 4 =
  13. 13.137 × 4 =
  14. 14.160 × 4 =
  15. 15.84 × 4 =
  16. 16.25 × 8 =
  17. 17.28 × 8 =
  18. 18.24 × 8 =
  19. 19.95 × 4 =
  20. 20.124 × 4 =
  21. 21.56 × 8 =
  22. 22.20 × 8 =
  23. 23.31 × 8 =
  24. 24.160 × 4 =
  25. 25.62 × 8 =
  26. 26.28 × 8 =
  27. 27.18 × 8 =
  28. 28.159 × 4 =
  29. 29.13 × 8 =
  30. 30.58 × 8 =
  31. 31.29 × 4 =
  32. 32.62 × 4 =
  33. 33.70 × 4 =
  34. 34.38 × 8 =
  35. 35.21 × 4 =
  36. 36.23 × 8 =
  37. 37.41 × 8 =
  38. 38.67 × 8 =
  39. 39.110 × 4 =
  40. 40.50 × 8 =

Answer key

  1. 592
  2. 600
  3. 448
  4. 104
  5. 408
  6. 112
  7. 408
  8. 104
  9. 120
  10. 136
  11. 224
  12. 324
  13. 548
  14. 640
  15. 336
  16. 200
  17. 224
  18. 192
  19. 380
  20. 496
  21. 448
  22. 160
  23. 248
  24. 640
  25. 496
  26. 224
  27. 144
  28. 636
  29. 104
  30. 464
  31. 116
  32. 248
  33. 280
  34. 304
  35. 84
  36. 184
  37. 328
  38. 536
  39. 440
  40. 400

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