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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 766 · 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. 1.150 × 4 =
  2. 2.40 × 8 =
  3. 3.18 × 8 =
  4. 4.18 × 8 =
  5. 5.30 × 4 =
  6. 6.158 × 4 =
  7. 7.69 × 8 =
  8. 8.61 × 8 =
  9. 9.25 × 4 =
  10. 10.90 × 4 =
  11. 11.14 × 4 =
  12. 12.67 × 8 =
  13. 13.80 × 4 =
  14. 14.115 × 4 =
  15. 15.54 × 8 =
  16. 16.25 × 8 =
  17. 17.49 × 4 =
  18. 18.63 × 8 =
  19. 19.42 × 8 =
  20. 20.72 × 4 =
  21. 21.37 × 8 =
  22. 22.65 × 8 =
  23. 23.160 × 4 =
  24. 24.133 × 4 =
  25. 25.52 × 8 =
  26. 26.68 × 4 =
  27. 27.35 × 4 =
  28. 28.52 × 8 =
  29. 29.55 × 8 =
  30. 30.53 × 4 =
  31. 31.75 × 4 =
  32. 32.64 × 4 =
  33. 33.44 × 8 =
  34. 34.38 × 4 =
  35. 35.20 × 8 =
  36. 36.31 × 8 =
  37. 37.14 × 8 =
  38. 38.27 × 8 =
  39. 39.48 × 4 =
  40. 40.122 × 4 =

Answer key

  1. 600
  2. 320
  3. 144
  4. 144
  5. 120
  6. 632
  7. 552
  8. 488
  9. 100
  10. 360
  11. 56
  12. 536
  13. 320
  14. 460
  15. 432
  16. 200
  17. 196
  18. 504
  19. 336
  20. 288
  21. 296
  22. 520
  23. 640
  24. 532
  25. 416
  26. 272
  27. 140
  28. 416
  29. 440
  30. 212
  31. 300
  32. 256
  33. 352
  34. 152
  35. 160
  36. 248
  37. 112
  38. 216
  39. 192
  40. 488

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