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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 566 · 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. 1.39 × 4 =
  2. 2.116 × 4 =
  3. 3.104 × 4 =
  4. 4.24 × 8 =
  5. 5.39 × 8 =
  6. 6.41 × 8 =
  7. 7.103 × 4 =
  8. 8.28 × 4 =
  9. 9.56 × 8 =
  10. 10.55 × 8 =
  11. 11.55 × 8 =
  12. 12.114 × 4 =
  13. 13.34 × 8 =
  14. 14.139 × 4 =
  15. 15.31 × 8 =
  16. 16.54 × 4 =
  17. 17.57 × 8 =
  18. 18.97 × 4 =
  19. 19.43 × 4 =
  20. 20.53 × 8 =
  21. 21.35 × 8 =
  22. 22.42 × 4 =
  23. 23.103 × 4 =
  24. 24.68 × 8 =
  25. 25.65 × 4 =
  26. 26.71 × 4 =
  27. 27.12 × 8 =
  28. 28.23 × 8 =
  29. 29.38 × 8 =
  30. 30.39 × 4 =
  31. 31.61 × 4 =
  32. 32.25 × 8 =
  33. 33.41 × 4 =
  34. 34.37 × 8 =
  35. 35.118 × 4 =
  36. 36.120 × 4 =
  37. 37.101 × 4 =
  38. 38.12 × 8 =
  39. 39.12 × 8 =
  40. 40.62 × 8 =

Answer key

  1. 156
  2. 464
  3. 416
  4. 192
  5. 312
  6. 328
  7. 412
  8. 112
  9. 448
  10. 440
  11. 440
  12. 456
  13. 272
  14. 556
  15. 248
  16. 216
  17. 456
  18. 388
  19. 172
  20. 424
  21. 280
  22. 168
  23. 412
  24. 544
  25. 260
  26. 284
  27. 96
  28. 184
  29. 304
  30. 156
  31. 244
  32. 200
  33. 164
  34. 296
  35. 472
  36. 480
  37. 404
  38. 96
  39. 96
  40. 496

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