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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 147 · 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. 1.34 × 8 =
  2. 2.156 × 4 =
  3. 3.41 × 8 =
  4. 4.24 × 4 =
  5. 5.69 × 8 =
  6. 6.34 × 8 =
  7. 7.97 × 4 =
  8. 8.26 × 8 =
  9. 9.96 × 4 =
  10. 10.57 × 8 =
  11. 11.91 × 4 =
  12. 12.97 × 4 =
  13. 13.97 × 4 =
  14. 14.56 × 8 =
  15. 15.64 × 8 =
  16. 16.62 × 4 =
  17. 17.145 × 4 =
  18. 18.44 × 8 =
  19. 19.51 × 8 =
  20. 20.53 × 8 =
  21. 21.39 × 8 =
  22. 22.92 × 4 =
  23. 23.31 × 8 =
  24. 24.46 × 4 =
  25. 25.87 × 4 =
  26. 26.21 × 4 =
  27. 27.24 × 8 =
  28. 28.63 × 8 =
  29. 29.80 × 4 =
  30. 30.39 × 8 =
  31. 31.12 × 8 =
  32. 32.53 × 4 =
  33. 33.79 × 4 =
  34. 34.48 × 8 =
  35. 35.25 × 8 =
  36. 36.52 × 8 =
  37. 37.26 × 8 =
  38. 38.85 × 4 =
  39. 39.95 × 4 =
  40. 40.107 × 4 =

Answer key

  1. 272
  2. 624
  3. 328
  4. 96
  5. 552
  6. 272
  7. 388
  8. 208
  9. 384
  10. 456
  11. 364
  12. 388
  13. 388
  14. 448
  15. 512
  16. 248
  17. 580
  18. 352
  19. 408
  20. 424
  21. 312
  22. 368
  23. 248
  24. 184
  25. 348
  26. 84
  27. 192
  28. 504
  29. 320
  30. 312
  31. 96
  32. 212
  33. 316
  34. 384
  35. 200
  36. 416
  37. 208
  38. 340
  39. 380
  40. 428

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