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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 517 · 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. 1.69 × 4 =
  2. 2.72 × 8 =
  3. 3.39 × 8 =
  4. 4.101 × 4 =
  5. 5.38 × 8 =
  6. 6.56 × 8 =
  7. 7.99 × 4 =
  8. 8.41 × 8 =
  9. 9.13 × 8 =
  10. 10.27 × 4 =
  11. 11.14 × 8 =
  12. 12.44 × 8 =
  13. 13.112 × 4 =
  14. 14.158 × 4 =
  15. 15.32 × 4 =
  16. 16.94 × 4 =
  17. 17.13 × 8 =
  18. 18.39 × 8 =
  19. 19.44 × 8 =
  20. 20.23 × 8 =
  21. 21.108 × 4 =
  22. 22.67 × 4 =
  23. 23.23 × 8 =
  24. 24.80 × 4 =
  25. 25.64 × 4 =
  26. 26.24 × 8 =
  27. 27.132 × 4 =
  28. 28.16 × 8 =
  29. 29.13 × 8 =
  30. 30.46 × 4 =
  31. 31.62 × 8 =
  32. 32.58 × 4 =
  33. 33.74 × 8 =
  34. 34.43 × 8 =
  35. 35.57 × 8 =
  36. 36.37 × 4 =
  37. 37.58 × 8 =
  38. 38.65 × 4 =
  39. 39.24 × 8 =
  40. 40.14 × 8 =

Answer key

  1. 276
  2. 576
  3. 312
  4. 404
  5. 304
  6. 448
  7. 396
  8. 328
  9. 104
  10. 108
  11. 112
  12. 352
  13. 448
  14. 632
  15. 128
  16. 376
  17. 104
  18. 312
  19. 352
  20. 184
  21. 432
  22. 268
  23. 184
  24. 320
  25. 256
  26. 192
  27. 528
  28. 128
  29. 104
  30. 184
  31. 496
  32. 232
  33. 592
  34. 344
  35. 456
  36. 148
  37. 464
  38. 260
  39. 192
  40. 112

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