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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 595 · 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. 1.141 × 4 =
  2. 2.47 × 8 =
  3. 3.140 × 4 =
  4. 4.69 × 8 =
  5. 5.143 × 4 =
  6. 6.73 × 8 =
  7. 7.71 × 8 =
  8. 8.22 × 8 =
  9. 9.80 × 4 =
  10. 10.44 × 4 =
  11. 11.122 × 4 =
  12. 12.62 × 8 =
  13. 13.18 × 8 =
  14. 14.39 × 8 =
  15. 15.49 × 4 =
  16. 16.31 × 8 =
  17. 17.66 × 8 =
  18. 18.50 × 8 =
  19. 19.103 × 4 =
  20. 20.25 × 8 =
  21. 21.24 × 4 =
  22. 22.136 × 4 =
  23. 23.31 × 4 =
  24. 24.18 × 4 =
  25. 25.26 × 8 =
  26. 26.59 × 4 =
  27. 27.99 × 4 =
  28. 28.57 × 8 =
  29. 29.69 × 4 =
  30. 30.16 × 4 =
  31. 31.47 × 8 =
  32. 32.131 × 4 =
  33. 33.144 × 4 =
  34. 34.33 × 4 =
  35. 35.55 × 4 =
  36. 36.44 × 4 =
  37. 37.94 × 4 =
  38. 38.76 × 4 =
  39. 39.153 × 4 =
  40. 40.28 × 8 =

Answer key

  1. 564
  2. 376
  3. 560
  4. 552
  5. 572
  6. 584
  7. 568
  8. 176
  9. 320
  10. 176
  11. 488
  12. 496
  13. 144
  14. 312
  15. 196
  16. 248
  17. 528
  18. 400
  19. 412
  20. 200
  21. 96
  22. 544
  23. 124
  24. 72
  25. 208
  26. 236
  27. 396
  28. 456
  29. 276
  30. 64
  31. 376
  32. 524
  33. 576
  34. 132
  35. 220
  36. 176
  37. 376
  38. 304
  39. 612
  40. 224

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