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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 474 · 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. 1.18 × 8 =
  2. 2.43 × 4 =
  3. 3.65 × 8 =
  4. 4.62 × 8 =
  5. 5.54 × 8 =
  6. 6.14 × 4 =
  7. 7.53 × 8 =
  8. 8.140 × 4 =
  9. 9.69 × 4 =
  10. 10.125 × 4 =
  11. 11.62 × 4 =
  12. 12.127 × 4 =
  13. 13.103 × 4 =
  14. 14.126 × 4 =
  15. 15.21 × 8 =
  16. 16.43 × 8 =
  17. 17.79 × 4 =
  18. 18.52 × 8 =
  19. 19.31 × 8 =
  20. 20.35 × 4 =
  21. 21.37 × 8 =
  22. 22.72 × 4 =
  23. 23.74 × 8 =
  24. 24.71 × 8 =
  25. 25.34 × 8 =
  26. 26.27 × 8 =
  27. 27.37 × 4 =
  28. 28.69 × 8 =
  29. 29.155 × 4 =
  30. 30.49 × 8 =
  31. 31.24 × 4 =
  32. 32.26 × 4 =
  33. 33.14 × 8 =
  34. 34.42 × 8 =
  35. 35.155 × 4 =
  36. 36.16 × 4 =
  37. 37.62 × 8 =
  38. 38.140 × 4 =
  39. 39.27 × 8 =
  40. 40.22 × 8 =

Answer key

  1. 144
  2. 172
  3. 520
  4. 496
  5. 432
  6. 56
  7. 424
  8. 560
  9. 276
  10. 500
  11. 248
  12. 508
  13. 412
  14. 504
  15. 168
  16. 344
  17. 316
  18. 416
  19. 248
  20. 140
  21. 296
  22. 288
  23. 592
  24. 568
  25. 272
  26. 216
  27. 148
  28. 552
  29. 620
  30. 392
  31. 96
  32. 104
  33. 112
  34. 336
  35. 620
  36. 64
  37. 496
  38. 560
  39. 216
  40. 176

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