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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 554 · 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. 1.38 × 8 =
  2. 2.106 × 4 =
  3. 3.16 × 4 =
  4. 4.120 × 4 =
  5. 5.40 × 4 =
  6. 6.15 × 8 =
  7. 7.117 × 4 =
  8. 8.71 × 4 =
  9. 9.141 × 4 =
  10. 10.13 × 8 =
  11. 11.48 × 8 =
  12. 12.110 × 4 =
  13. 13.74 × 8 =
  14. 14.149 × 4 =
  15. 15.56 × 4 =
  16. 16.41 × 4 =
  17. 17.59 × 8 =
  18. 18.94 × 4 =
  19. 19.24 × 4 =
  20. 20.54 × 8 =
  21. 21.61 × 8 =
  22. 22.63 × 4 =
  23. 23.124 × 4 =
  24. 24.29 × 8 =
  25. 25.70 × 8 =
  26. 26.27 × 8 =
  27. 27.23 × 8 =
  28. 28.68 × 8 =
  29. 29.93 × 4 =
  30. 30.90 × 4 =
  31. 31.98 × 4 =
  32. 32.156 × 4 =
  33. 33.115 × 4 =
  34. 34.122 × 4 =
  35. 35.50 × 8 =
  36. 36.21 × 8 =
  37. 37.119 × 4 =
  38. 38.30 × 4 =
  39. 39.34 × 4 =
  40. 40.25 × 8 =

Answer key

  1. 304
  2. 424
  3. 64
  4. 480
  5. 160
  6. 120
  7. 468
  8. 284
  9. 564
  10. 104
  11. 384
  12. 440
  13. 592
  14. 596
  15. 224
  16. 164
  17. 472
  18. 376
  19. 96
  20. 432
  21. 488
  22. 252
  23. 496
  24. 232
  25. 560
  26. 216
  27. 184
  28. 544
  29. 372
  30. 360
  31. 392
  32. 624
  33. 460
  34. 488
  35. 400
  36. 168
  37. 476
  38. 120
  39. 136
  40. 200

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