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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 268 · 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. 1.76 × 4 =
  2. 2.22 × 8 =
  3. 3.59 × 8 =
  4. 4.31 × 8 =
  5. 5.93 × 4 =
  6. 6.14 × 4 =
  7. 7.45 × 8 =
  8. 8.12 × 8 =
  9. 9.45 × 8 =
  10. 10.100 × 4 =
  11. 11.98 × 4 =
  12. 12.21 × 4 =
  13. 13.63 × 8 =
  14. 14.18 × 8 =
  15. 15.14 × 8 =
  16. 16.54 × 8 =
  17. 17.57 × 8 =
  18. 18.58 × 8 =
  19. 19.16 × 4 =
  20. 20.66 × 4 =
  21. 21.103 × 4 =
  22. 22.74 × 4 =
  23. 23.15 × 8 =
  24. 24.72 × 8 =
  25. 25.40 × 8 =
  26. 26.50 × 8 =
  27. 27.16 × 8 =
  28. 28.70 × 4 =
  29. 29.156 × 4 =
  30. 30.72 × 8 =
  31. 31.149 × 4 =
  32. 32.38 × 8 =
  33. 33.110 × 4 =
  34. 34.48 × 8 =
  35. 35.68 × 8 =
  36. 36.24 × 4 =
  37. 37.149 × 4 =
  38. 38.146 × 4 =
  39. 39.70 × 8 =
  40. 40.75 × 4 =

Answer key

  1. 304
  2. 176
  3. 472
  4. 248
  5. 372
  6. 56
  7. 360
  8. 96
  9. 360
  10. 400
  11. 392
  12. 84
  13. 504
  14. 144
  15. 112
  16. 432
  17. 456
  18. 464
  19. 64
  20. 264
  21. 412
  22. 296
  23. 120
  24. 576
  25. 320
  26. 400
  27. 128
  28. 280
  29. 624
  30. 576
  31. 596
  32. 304
  33. 440
  34. 384
  35. 544
  36. 96
  37. 596
  38. 584
  39. 560
  40. 300

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