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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 946 · 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. 1.47 × 8 =
  2. 2.76 × 4 =
  3. 3.19 × 8 =
  4. 4.68 × 4 =
  5. 5.40 × 8 =
  6. 6.47 × 8 =
  7. 7.62 × 8 =
  8. 8.34 × 8 =
  9. 9.25 × 4 =
  10. 10.36 × 4 =
  11. 11.92 × 4 =
  12. 12.127 × 4 =
  13. 13.39 × 8 =
  14. 14.57 × 8 =
  15. 15.21 × 8 =
  16. 16.55 × 8 =
  17. 17.63 × 4 =
  18. 18.75 × 8 =
  19. 19.99 × 4 =
  20. 20.73 × 8 =
  21. 21.74 × 8 =
  22. 22.36 × 8 =
  23. 23.51 × 8 =
  24. 24.15 × 4 =
  25. 25.24 × 4 =
  26. 26.15 × 4 =
  27. 27.34 × 8 =
  28. 28.144 × 4 =
  29. 29.54 × 4 =
  30. 30.149 × 4 =
  31. 31.79 × 4 =
  32. 32.108 × 4 =
  33. 33.22 × 8 =
  34. 34.146 × 4 =
  35. 35.52 × 8 =
  36. 36.18 × 4 =
  37. 37.43 × 4 =
  38. 38.37 × 8 =
  39. 39.16 × 4 =
  40. 40.48 × 8 =

Answer key

  1. 376
  2. 304
  3. 152
  4. 272
  5. 320
  6. 376
  7. 496
  8. 272
  9. 100
  10. 144
  11. 368
  12. 508
  13. 312
  14. 456
  15. 168
  16. 440
  17. 252
  18. 600
  19. 396
  20. 584
  21. 592
  22. 288
  23. 408
  24. 60
  25. 96
  26. 60
  27. 272
  28. 576
  29. 216
  30. 596
  31. 316
  32. 432
  33. 176
  34. 584
  35. 416
  36. 72
  37. 172
  38. 296
  39. 64
  40. 384

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