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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 93 · 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. 1.123 × 4 =
  2. 2.86 × 4 =
  3. 3.131 × 4 =
  4. 4.65 × 4 =
  5. 5.140 × 4 =
  6. 6.74 × 4 =
  7. 7.114 × 4 =
  8. 8.51 × 4 =
  9. 9.96 × 4 =
  10. 10.72 × 4 =
  11. 11.17 × 8 =
  12. 12.90 × 4 =
  13. 13.25 × 8 =
  14. 14.136 × 4 =
  15. 15.36 × 8 =
  16. 16.65 × 8 =
  17. 17.22 × 8 =
  18. 18.44 × 8 =
  19. 19.34 × 8 =
  20. 20.100 × 4 =
  21. 21.71 × 8 =
  22. 22.23 × 4 =
  23. 23.43 × 4 =
  24. 24.110 × 4 =
  25. 25.124 × 4 =
  26. 26.13 × 4 =
  27. 27.34 × 8 =
  28. 28.55 × 4 =
  29. 29.17 × 8 =
  30. 30.70 × 8 =
  31. 31.54 × 4 =
  32. 32.17 × 8 =
  33. 33.64 × 4 =
  34. 34.118 × 4 =
  35. 35.154 × 4 =
  36. 36.54 × 8 =
  37. 37.28 × 8 =
  38. 38.119 × 4 =
  39. 39.63 × 8 =
  40. 40.44 × 8 =

Answer key

  1. 492
  2. 344
  3. 524
  4. 260
  5. 560
  6. 296
  7. 456
  8. 204
  9. 384
  10. 288
  11. 136
  12. 360
  13. 200
  14. 544
  15. 288
  16. 520
  17. 176
  18. 352
  19. 272
  20. 400
  21. 568
  22. 92
  23. 172
  24. 440
  25. 496
  26. 52
  27. 272
  28. 220
  29. 136
  30. 560
  31. 216
  32. 136
  33. 256
  34. 472
  35. 616
  36. 432
  37. 224
  38. 476
  39. 504
  40. 352

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