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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 341 · 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. 1.54 × 8 =
  2. 2.82 × 4 =
  3. 3.64 × 4 =
  4. 4.140 × 4 =
  5. 5.17 × 8 =
  6. 6.78 × 4 =
  7. 7.44 × 8 =
  8. 8.48 × 4 =
  9. 9.160 × 4 =
  10. 10.146 × 4 =
  11. 11.57 × 8 =
  12. 12.103 × 4 =
  13. 13.14 × 4 =
  14. 14.124 × 4 =
  15. 15.60 × 8 =
  16. 16.132 × 4 =
  17. 17.71 × 8 =
  18. 18.54 × 4 =
  19. 19.62 × 4 =
  20. 20.119 × 4 =
  21. 21.55 × 8 =
  22. 22.20 × 8 =
  23. 23.89 × 4 =
  24. 24.65 × 4 =
  25. 25.76 × 4 =
  26. 26.154 × 4 =
  27. 27.97 × 4 =
  28. 28.18 × 8 =
  29. 29.55 × 4 =
  30. 30.35 × 8 =
  31. 31.108 × 4 =
  32. 32.52 × 8 =
  33. 33.37 × 8 =
  34. 34.67 × 8 =
  35. 35.51 × 8 =
  36. 36.85 × 4 =
  37. 37.35 × 4 =
  38. 38.24 × 4 =
  39. 39.47 × 8 =
  40. 40.140 × 4 =

Answer key

  1. 432
  2. 328
  3. 256
  4. 560
  5. 136
  6. 312
  7. 352
  8. 192
  9. 640
  10. 584
  11. 456
  12. 412
  13. 56
  14. 496
  15. 480
  16. 528
  17. 568
  18. 216
  19. 248
  20. 476
  21. 440
  22. 160
  23. 356
  24. 260
  25. 304
  26. 616
  27. 388
  28. 144
  29. 220
  30. 280
  31. 432
  32. 416
  33. 296
  34. 536
  35. 408
  36. 340
  37. 140
  38. 96
  39. 376
  40. 560

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