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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 544 · 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. 1.75 × 4 =
  2. 2.136 × 4 =
  3. 3.52 × 4 =
  4. 4.71 × 8 =
  5. 5.26 × 8 =
  6. 6.145 × 4 =
  7. 7.70 × 8 =
  8. 8.16 × 8 =
  9. 9.62 × 8 =
  10. 10.83 × 4 =
  11. 11.17 × 8 =
  12. 12.125 × 4 =
  13. 13.16 × 4 =
  14. 14.35 × 8 =
  15. 15.18 × 8 =
  16. 16.52 × 8 =
  17. 17.22 × 8 =
  18. 18.56 × 8 =
  19. 19.126 × 4 =
  20. 20.21 × 4 =
  21. 21.67 × 4 =
  22. 22.32 × 8 =
  23. 23.75 × 8 =
  24. 24.81 × 4 =
  25. 25.126 × 4 =
  26. 26.63 × 8 =
  27. 27.37 × 8 =
  28. 28.56 × 8 =
  29. 29.57 × 8 =
  30. 30.17 × 4 =
  31. 31.56 × 4 =
  32. 32.39 × 8 =
  33. 33.54 × 4 =
  34. 34.56 × 4 =
  35. 35.36 × 4 =
  36. 36.16 × 4 =
  37. 37.43 × 4 =
  38. 38.124 × 4 =
  39. 39.30 × 4 =
  40. 40.61 × 8 =

Answer key

  1. 300
  2. 544
  3. 208
  4. 568
  5. 208
  6. 580
  7. 560
  8. 128
  9. 496
  10. 332
  11. 136
  12. 500
  13. 64
  14. 280
  15. 144
  16. 416
  17. 176
  18. 448
  19. 504
  20. 84
  21. 268
  22. 256
  23. 600
  24. 324
  25. 504
  26. 504
  27. 296
  28. 448
  29. 456
  30. 68
  31. 224
  32. 312
  33. 216
  34. 224
  35. 144
  36. 64
  37. 172
  38. 496
  39. 120
  40. 488

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