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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 259 · 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. 1.46 × 4 =
  2. 2.33 × 8 =
  3. 3.125 × 4 =
  4. 4.117 × 4 =
  5. 5.61 × 4 =
  6. 6.140 × 4 =
  7. 7.145 × 4 =
  8. 8.139 × 4 =
  9. 9.131 × 4 =
  10. 10.52 × 8 =
  11. 11.52 × 8 =
  12. 12.71 × 8 =
  13. 13.91 × 4 =
  14. 14.53 × 8 =
  15. 15.22 × 8 =
  16. 16.52 × 8 =
  17. 17.137 × 4 =
  18. 18.110 × 4 =
  19. 19.20 × 4 =
  20. 20.101 × 4 =
  21. 21.36 × 8 =
  22. 22.21 × 8 =
  23. 23.126 × 4 =
  24. 24.99 × 4 =
  25. 25.54 × 8 =
  26. 26.22 × 8 =
  27. 27.96 × 4 =
  28. 28.48 × 8 =
  29. 29.44 × 8 =
  30. 30.36 × 4 =
  31. 31.79 × 4 =
  32. 32.15 × 8 =
  33. 33.39 × 8 =
  34. 34.158 × 4 =
  35. 35.159 × 4 =
  36. 36.40 × 8 =
  37. 37.42 × 4 =
  38. 38.96 × 4 =
  39. 39.44 × 4 =
  40. 40.46 × 8 =

Answer key

  1. 184
  2. 264
  3. 500
  4. 468
  5. 244
  6. 560
  7. 580
  8. 556
  9. 524
  10. 416
  11. 416
  12. 568
  13. 364
  14. 424
  15. 176
  16. 416
  17. 548
  18. 440
  19. 80
  20. 404
  21. 288
  22. 168
  23. 504
  24. 396
  25. 432
  26. 176
  27. 384
  28. 384
  29. 352
  30. 144
  31. 316
  32. 120
  33. 312
  34. 632
  35. 636
  36. 320
  37. 168
  38. 384
  39. 176
  40. 368

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