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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 368 · 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. 1.67 × 4 =
  2. 2.21 × 8 =
  3. 3.15 × 4 =
  4. 4.50 × 4 =
  5. 5.56 × 8 =
  6. 6.33 × 4 =
  7. 7.60 × 8 =
  8. 8.123 × 4 =
  9. 9.67 × 4 =
  10. 10.66 × 8 =
  11. 11.81 × 4 =
  12. 12.96 × 4 =
  13. 13.99 × 4 =
  14. 14.34 × 4 =
  15. 15.30 × 8 =
  16. 16.71 × 8 =
  17. 17.137 × 4 =
  18. 18.61 × 8 =
  19. 19.27 × 8 =
  20. 20.118 × 4 =
  21. 21.159 × 4 =
  22. 22.25 × 8 =
  23. 23.71 × 8 =
  24. 24.50 × 8 =
  25. 25.17 × 4 =
  26. 26.144 × 4 =
  27. 27.43 × 8 =
  28. 28.139 × 4 =
  29. 29.144 × 4 =
  30. 30.104 × 4 =
  31. 31.67 × 8 =
  32. 32.64 × 8 =
  33. 33.102 × 4 =
  34. 34.47 × 8 =
  35. 35.51 × 8 =
  36. 36.85 × 4 =
  37. 37.72 × 4 =
  38. 38.43 × 4 =
  39. 39.126 × 4 =
  40. 40.30 × 8 =

Answer key

  1. 268
  2. 168
  3. 60
  4. 200
  5. 448
  6. 132
  7. 480
  8. 492
  9. 268
  10. 528
  11. 324
  12. 384
  13. 396
  14. 136
  15. 240
  16. 568
  17. 548
  18. 488
  19. 216
  20. 472
  21. 636
  22. 200
  23. 568
  24. 400
  25. 68
  26. 576
  27. 344
  28. 556
  29. 576
  30. 416
  31. 536
  32. 512
  33. 408
  34. 376
  35. 408
  36. 340
  37. 288
  38. 172
  39. 504
  40. 240

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