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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 218 · 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. 1.25 × 4 =
  2. 2.74 × 4 =
  3. 3.150 × 4 =
  4. 4.75 × 8 =
  5. 5.18 × 8 =
  6. 6.77 × 4 =
  7. 7.40 × 4 =
  8. 8.50 × 8 =
  9. 9.21 × 8 =
  10. 10.34 × 8 =
  11. 11.92 × 4 =
  12. 12.81 × 4 =
  13. 13.25 × 4 =
  14. 14.65 × 4 =
  15. 15.25 × 8 =
  16. 16.22 × 8 =
  17. 17.31 × 8 =
  18. 18.55 × 4 =
  19. 19.13 × 4 =
  20. 20.34 × 4 =
  21. 21.62 × 8 =
  22. 22.37 × 4 =
  23. 23.111 × 4 =
  24. 24.73 × 8 =
  25. 25.20 × 8 =
  26. 26.37 × 8 =
  27. 27.91 × 4 =
  28. 28.64 × 4 =
  29. 29.22 × 8 =
  30. 30.41 × 8 =
  31. 31.19 × 8 =
  32. 32.33 × 8 =
  33. 33.37 × 8 =
  34. 34.104 × 4 =
  35. 35.52 × 8 =
  36. 36.72 × 4 =
  37. 37.51 × 8 =
  38. 38.72 × 4 =
  39. 39.14 × 4 =
  40. 40.44 × 4 =

Answer key

  1. 100
  2. 296
  3. 600
  4. 600
  5. 144
  6. 308
  7. 160
  8. 400
  9. 168
  10. 272
  11. 368
  12. 324
  13. 100
  14. 260
  15. 200
  16. 176
  17. 248
  18. 220
  19. 52
  20. 136
  21. 496
  22. 148
  23. 444
  24. 584
  25. 160
  26. 296
  27. 364
  28. 256
  29. 176
  30. 328
  31. 152
  32. 264
  33. 296
  34. 416
  35. 416
  36. 288
  37. 408
  38. 288
  39. 56
  40. 176

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