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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 890 · 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. 1.42 × 4 =
  2. 2.55 × 4 =
  3. 3.34 × 4 =
  4. 4.155 × 4 =
  5. 5.67 × 8 =
  6. 6.37 × 8 =
  7. 7.74 × 8 =
  8. 8.158 × 4 =
  9. 9.51 × 8 =
  10. 10.112 × 4 =
  11. 11.43 × 8 =
  12. 12.48 × 8 =
  13. 13.74 × 4 =
  14. 14.73 × 8 =
  15. 15.15 × 4 =
  16. 16.65 × 4 =
  17. 17.127 × 4 =
  18. 18.43 × 8 =
  19. 19.72 × 4 =
  20. 20.44 × 8 =
  21. 21.46 × 4 =
  22. 22.78 × 4 =
  23. 23.116 × 4 =
  24. 24.99 × 4 =
  25. 25.127 × 4 =
  26. 26.59 × 8 =
  27. 27.44 × 8 =
  28. 28.46 × 8 =
  29. 29.64 × 4 =
  30. 30.75 × 4 =
  31. 31.30 × 4 =
  32. 32.50 × 8 =
  33. 33.111 × 4 =
  34. 34.14 × 4 =
  35. 35.112 × 4 =
  36. 36.107 × 4 =
  37. 37.48 × 8 =
  38. 38.93 × 4 =
  39. 39.141 × 4 =
  40. 40.35 × 4 =

Answer key

  1. 168
  2. 220
  3. 136
  4. 620
  5. 536
  6. 296
  7. 592
  8. 632
  9. 408
  10. 448
  11. 344
  12. 384
  13. 296
  14. 584
  15. 60
  16. 260
  17. 508
  18. 344
  19. 288
  20. 352
  21. 184
  22. 312
  23. 464
  24. 396
  25. 508
  26. 472
  27. 352
  28. 368
  29. 256
  30. 300
  31. 120
  32. 400
  33. 444
  34. 56
  35. 448
  36. 428
  37. 384
  38. 372
  39. 564
  40. 140

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