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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 652 · 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. 1.144 × 4 =
  2. 2.70 × 8 =
  3. 3.27 × 8 =
  4. 4.154 × 4 =
  5. 5.31 × 8 =
  6. 6.146 × 4 =
  7. 7.34 × 8 =
  8. 8.74 × 8 =
  9. 9.36 × 8 =
  10. 10.42 × 8 =
  11. 11.30 × 4 =
  12. 12.148 × 4 =
  13. 13.72 × 4 =
  14. 14.111 × 4 =
  15. 15.29 × 8 =
  16. 16.78 × 4 =
  17. 17.20 × 8 =
  18. 18.75 × 8 =
  19. 19.26 × 8 =
  20. 20.18 × 8 =
  21. 21.29 × 4 =
  22. 22.68 × 8 =
  23. 23.34 × 4 =
  24. 24.71 × 8 =
  25. 25.38 × 8 =
  26. 26.40 × 4 =
  27. 27.17 × 8 =
  28. 28.17 × 4 =
  29. 29.90 × 4 =
  30. 30.36 × 8 =
  31. 31.65 × 4 =
  32. 32.57 × 8 =
  33. 33.97 × 4 =
  34. 34.69 × 8 =
  35. 35.32 × 8 =
  36. 36.71 × 8 =
  37. 37.134 × 4 =
  38. 38.47 × 8 =
  39. 39.70 × 4 =
  40. 40.16 × 4 =

Answer key

  1. 576
  2. 560
  3. 216
  4. 616
  5. 248
  6. 584
  7. 272
  8. 592
  9. 288
  10. 336
  11. 120
  12. 592
  13. 288
  14. 444
  15. 232
  16. 312
  17. 160
  18. 600
  19. 208
  20. 144
  21. 116
  22. 544
  23. 136
  24. 568
  25. 304
  26. 160
  27. 136
  28. 68
  29. 360
  30. 288
  31. 260
  32. 456
  33. 388
  34. 552
  35. 256
  36. 568
  37. 536
  38. 376
  39. 280
  40. 64

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