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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 659 · 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. 1.153 × 4 =
  2. 2.24 × 4 =
  3. 3.115 × 4 =
  4. 4.59 × 4 =
  5. 5.68 × 8 =
  6. 6.154 × 4 =
  7. 7.41 × 4 =
  8. 8.25 × 8 =
  9. 9.20 × 8 =
  10. 10.40 × 8 =
  11. 11.115 × 4 =
  12. 12.52 × 4 =
  13. 13.20 × 8 =
  14. 14.22 × 8 =
  15. 15.32 × 8 =
  16. 16.67 × 8 =
  17. 17.148 × 4 =
  18. 18.156 × 4 =
  19. 19.56 × 8 =
  20. 20.55 × 8 =
  21. 21.146 × 4 =
  22. 22.53 × 8 =
  23. 23.80 × 4 =
  24. 24.83 × 4 =
  25. 25.61 × 4 =
  26. 26.106 × 4 =
  27. 27.21 × 8 =
  28. 28.67 × 8 =
  29. 29.22 × 8 =
  30. 30.55 × 8 =
  31. 31.45 × 8 =
  32. 32.66 × 4 =
  33. 33.84 × 4 =
  34. 34.26 × 8 =
  35. 35.37 × 8 =
  36. 36.75 × 4 =
  37. 37.25 × 8 =
  38. 38.21 × 8 =
  39. 39.150 × 4 =
  40. 40.28 × 8 =

Answer key

  1. 612
  2. 96
  3. 460
  4. 236
  5. 544
  6. 616
  7. 164
  8. 200
  9. 160
  10. 320
  11. 460
  12. 208
  13. 160
  14. 176
  15. 256
  16. 536
  17. 592
  18. 624
  19. 448
  20. 440
  21. 584
  22. 424
  23. 320
  24. 332
  25. 244
  26. 424
  27. 168
  28. 536
  29. 176
  30. 440
  31. 360
  32. 264
  33. 336
  34. 208
  35. 296
  36. 300
  37. 200
  38. 168
  39. 600
  40. 224

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