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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 172 · 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. 1.84 × 4 =
  2. 2.49 × 8 =
  3. 3.39 × 8 =
  4. 4.28 × 8 =
  5. 5.56 × 8 =
  6. 6.64 × 4 =
  7. 7.56 × 4 =
  8. 8.30 × 8 =
  9. 9.95 × 4 =
  10. 10.41 × 4 =
  11. 11.139 × 4 =
  12. 12.160 × 4 =
  13. 13.32 × 8 =
  14. 14.67 × 8 =
  15. 15.28 × 8 =
  16. 16.95 × 4 =
  17. 17.27 × 8 =
  18. 18.38 × 8 =
  19. 19.22 × 8 =
  20. 20.27 × 8 =
  21. 21.24 × 4 =
  22. 22.26 × 8 =
  23. 23.115 × 4 =
  24. 24.102 × 4 =
  25. 25.64 × 4 =
  26. 26.53 × 8 =
  27. 27.155 × 4 =
  28. 28.18 × 8 =
  29. 29.60 × 8 =
  30. 30.21 × 4 =
  31. 31.16 × 8 =
  32. 32.49 × 4 =
  33. 33.136 × 4 =
  34. 34.37 × 8 =
  35. 35.50 × 8 =
  36. 36.24 × 8 =
  37. 37.143 × 4 =
  38. 38.55 × 8 =
  39. 39.27 × 8 =
  40. 40.104 × 4 =

Answer key

  1. 336
  2. 392
  3. 312
  4. 224
  5. 448
  6. 256
  7. 224
  8. 240
  9. 380
  10. 164
  11. 556
  12. 640
  13. 256
  14. 536
  15. 224
  16. 380
  17. 216
  18. 304
  19. 176
  20. 216
  21. 96
  22. 208
  23. 460
  24. 408
  25. 256
  26. 424
  27. 620
  28. 144
  29. 480
  30. 84
  31. 128
  32. 196
  33. 544
  34. 296
  35. 400
  36. 192
  37. 572
  38. 440
  39. 216
  40. 416

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