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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 868 · 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. 1.31 × 8 =
  2. 2.29 × 8 =
  3. 3.94 × 4 =
  4. 4.160 × 4 =
  5. 5.139 × 4 =
  6. 6.148 × 4 =
  7. 7.76 × 4 =
  8. 8.70 × 8 =
  9. 9.29 × 8 =
  10. 10.14 × 4 =
  11. 11.100 × 4 =
  12. 12.13 × 4 =
  13. 13.36 × 4 =
  14. 14.153 × 4 =
  15. 15.84 × 4 =
  16. 16.65 × 8 =
  17. 17.107 × 4 =
  18. 18.58 × 4 =
  19. 19.38 × 8 =
  20. 20.37 × 4 =
  21. 21.86 × 4 =
  22. 22.19 × 8 =
  23. 23.66 × 8 =
  24. 24.158 × 4 =
  25. 25.25 × 4 =
  26. 26.31 × 8 =
  27. 27.68 × 4 =
  28. 28.66 × 8 =
  29. 29.44 × 4 =
  30. 30.134 × 4 =
  31. 31.59 × 8 =
  32. 32.54 × 8 =
  33. 33.35 × 8 =
  34. 34.107 × 4 =
  35. 35.58 × 8 =
  36. 36.69 × 8 =
  37. 37.135 × 4 =
  38. 38.22 × 8 =
  39. 39.30 × 8 =
  40. 40.132 × 4 =

Answer key

  1. 248
  2. 232
  3. 376
  4. 640
  5. 556
  6. 592
  7. 304
  8. 560
  9. 232
  10. 56
  11. 400
  12. 52
  13. 144
  14. 612
  15. 336
  16. 520
  17. 428
  18. 232
  19. 304
  20. 148
  21. 344
  22. 152
  23. 528
  24. 632
  25. 100
  26. 248
  27. 272
  28. 528
  29. 176
  30. 536
  31. 472
  32. 432
  33. 280
  34. 428
  35. 464
  36. 552
  37. 540
  38. 176
  39. 240
  40. 528

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