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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 420 · 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. 1.65 × 8 =
  2. 2.43 × 4 =
  3. 3.63 × 8 =
  4. 4.15 × 8 =
  5. 5.141 × 4 =
  6. 6.81 × 4 =
  7. 7.63 × 8 =
  8. 8.56 × 8 =
  9. 9.117 × 4 =
  10. 10.16 × 8 =
  11. 11.88 × 4 =
  12. 12.16 × 8 =
  13. 13.52 × 8 =
  14. 14.35 × 4 =
  15. 15.66 × 8 =
  16. 16.141 × 4 =
  17. 17.79 × 4 =
  18. 18.150 × 4 =
  19. 19.54 × 8 =
  20. 20.107 × 4 =
  21. 21.160 × 4 =
  22. 22.46 × 4 =
  23. 23.49 × 8 =
  24. 24.19 × 4 =
  25. 25.64 × 8 =
  26. 26.148 × 4 =
  27. 27.54 × 4 =
  28. 28.20 × 8 =
  29. 29.113 × 4 =
  30. 30.49 × 4 =
  31. 31.23 × 8 =
  32. 32.19 × 8 =
  33. 33.58 × 8 =
  34. 34.33 × 4 =
  35. 35.52 × 8 =
  36. 36.27 × 8 =
  37. 37.158 × 4 =
  38. 38.45 × 4 =
  39. 39.49 × 4 =
  40. 40.56 × 4 =

Answer key

  1. 520
  2. 172
  3. 504
  4. 120
  5. 564
  6. 324
  7. 504
  8. 448
  9. 468
  10. 128
  11. 352
  12. 128
  13. 416
  14. 140
  15. 528
  16. 564
  17. 316
  18. 600
  19. 432
  20. 428
  21. 640
  22. 184
  23. 392
  24. 76
  25. 512
  26. 592
  27. 216
  28. 160
  29. 452
  30. 196
  31. 184
  32. 152
  33. 464
  34. 132
  35. 416
  36. 216
  37. 632
  38. 180
  39. 196
  40. 224

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