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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 372 · 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. 1.51 × 4 =
  2. 2.56 × 8 =
  3. 3.68 × 8 =
  4. 4.160 × 4 =
  5. 5.36 × 8 =
  6. 6.149 × 4 =
  7. 7.18 × 8 =
  8. 8.140 × 4 =
  9. 9.146 × 4 =
  10. 10.41 × 8 =
  11. 11.30 × 4 =
  12. 12.52 × 8 =
  13. 13.76 × 4 =
  14. 14.21 × 8 =
  15. 15.73 × 8 =
  16. 16.29 × 8 =
  17. 17.71 × 8 =
  18. 18.56 × 8 =
  19. 19.92 × 4 =
  20. 20.52 × 8 =
  21. 21.139 × 4 =
  22. 22.157 × 4 =
  23. 23.17 × 4 =
  24. 24.51 × 8 =
  25. 25.146 × 4 =
  26. 26.16 × 8 =
  27. 27.64 × 8 =
  28. 28.19 × 4 =
  29. 29.40 × 4 =
  30. 30.24 × 4 =
  31. 31.69 × 4 =
  32. 32.62 × 8 =
  33. 33.33 × 8 =
  34. 34.156 × 4 =
  35. 35.108 × 4 =
  36. 36.55 × 8 =
  37. 37.38 × 8 =
  38. 38.90 × 4 =
  39. 39.18 × 8 =
  40. 40.72 × 4 =

Answer key

  1. 204
  2. 448
  3. 544
  4. 640
  5. 288
  6. 596
  7. 144
  8. 560
  9. 584
  10. 328
  11. 120
  12. 416
  13. 304
  14. 168
  15. 584
  16. 232
  17. 568
  18. 448
  19. 368
  20. 416
  21. 556
  22. 628
  23. 68
  24. 408
  25. 584
  26. 128
  27. 512
  28. 76
  29. 160
  30. 96
  31. 276
  32. 496
  33. 264
  34. 624
  35. 432
  36. 440
  37. 304
  38. 360
  39. 144
  40. 288

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