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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 573 · 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. 1.15 × 4 =
  2. 2.42 × 4 =
  3. 3.26 × 8 =
  4. 4.29 × 8 =
  5. 5.126 × 4 =
  6. 6.39 × 8 =
  7. 7.80 × 4 =
  8. 8.19 × 4 =
  9. 9.155 × 4 =
  10. 10.101 × 4 =
  11. 11.29 × 4 =
  12. 12.29 × 4 =
  13. 13.113 × 4 =
  14. 14.43 × 4 =
  15. 15.71 × 4 =
  16. 16.69 × 4 =
  17. 17.98 × 4 =
  18. 18.22 × 8 =
  19. 19.125 × 4 =
  20. 20.16 × 4 =
  21. 21.124 × 4 =
  22. 22.62 × 8 =
  23. 23.57 × 8 =
  24. 24.43 × 4 =
  25. 25.37 × 8 =
  26. 26.43 × 8 =
  27. 27.37 × 4 =
  28. 28.43 × 8 =
  29. 29.56 × 4 =
  30. 30.108 × 4 =
  31. 31.51 × 4 =
  32. 32.20 × 8 =
  33. 33.154 × 4 =
  34. 34.32 × 8 =
  35. 35.13 × 4 =
  36. 36.32 × 8 =
  37. 37.15 × 8 =
  38. 38.119 × 4 =
  39. 39.143 × 4 =
  40. 40.107 × 4 =

Answer key

  1. 60
  2. 168
  3. 208
  4. 232
  5. 504
  6. 312
  7. 320
  8. 76
  9. 620
  10. 404
  11. 116
  12. 116
  13. 452
  14. 172
  15. 284
  16. 276
  17. 392
  18. 176
  19. 500
  20. 64
  21. 496
  22. 496
  23. 456
  24. 172
  25. 296
  26. 344
  27. 148
  28. 344
  29. 224
  30. 432
  31. 204
  32. 160
  33. 616
  34. 256
  35. 52
  36. 256
  37. 120
  38. 476
  39. 572
  40. 428

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