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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 664 · 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. 1.68 × 8 =
  2. 2.26 × 4 =
  3. 3.44 × 4 =
  4. 4.80 × 4 =
  5. 5.24 × 8 =
  6. 6.14 × 8 =
  7. 7.124 × 4 =
  8. 8.48 × 8 =
  9. 9.44 × 4 =
  10. 10.86 × 4 =
  11. 11.125 × 4 =
  12. 12.85 × 4 =
  13. 13.14 × 8 =
  14. 14.29 × 4 =
  15. 15.74 × 4 =
  16. 16.36 × 8 =
  17. 17.70 × 8 =
  18. 18.13 × 4 =
  19. 19.57 × 4 =
  20. 20.73 × 8 =
  21. 21.32 × 4 =
  22. 22.54 × 8 =
  23. 23.117 × 4 =
  24. 24.21 × 4 =
  25. 25.71 × 8 =
  26. 26.85 × 4 =
  27. 27.41 × 8 =
  28. 28.62 × 8 =
  29. 29.122 × 4 =
  30. 30.74 × 4 =
  31. 31.158 × 4 =
  32. 32.99 × 4 =
  33. 33.41 × 8 =
  34. 34.80 × 4 =
  35. 35.21 × 8 =
  36. 36.93 × 4 =
  37. 37.69 × 8 =
  38. 38.36 × 8 =
  39. 39.43 × 8 =
  40. 40.113 × 4 =

Answer key

  1. 544
  2. 104
  3. 176
  4. 320
  5. 192
  6. 112
  7. 496
  8. 384
  9. 176
  10. 344
  11. 500
  12. 340
  13. 112
  14. 116
  15. 296
  16. 288
  17. 560
  18. 52
  19. 228
  20. 584
  21. 128
  22. 432
  23. 468
  24. 84
  25. 568
  26. 340
  27. 328
  28. 496
  29. 488
  30. 296
  31. 632
  32. 396
  33. 328
  34. 320
  35. 168
  36. 372
  37. 552
  38. 288
  39. 344
  40. 452

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