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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 471 · 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. 1.99 × 4 =
  2. 2.85 × 4 =
  3. 3.52 × 8 =
  4. 4.113 × 4 =
  5. 5.44 × 4 =
  6. 6.23 × 8 =
  7. 7.56 × 4 =
  8. 8.48 × 8 =
  9. 9.74 × 8 =
  10. 10.74 × 8 =
  11. 11.14 × 4 =
  12. 12.21 × 8 =
  13. 13.97 × 4 =
  14. 14.33 × 4 =
  15. 15.90 × 4 =
  16. 16.53 × 4 =
  17. 17.63 × 4 =
  18. 18.57 × 8 =
  19. 19.26 × 8 =
  20. 20.15 × 4 =
  21. 21.96 × 4 =
  22. 22.41 × 4 =
  23. 23.29 × 4 =
  24. 24.67 × 8 =
  25. 25.34 × 8 =
  26. 26.40 × 8 =
  27. 27.81 × 4 =
  28. 28.20 × 4 =
  29. 29.41 × 8 =
  30. 30.140 × 4 =
  31. 31.75 × 8 =
  32. 32.116 × 4 =
  33. 33.53 × 8 =
  34. 34.23 × 8 =
  35. 35.22 × 4 =
  36. 36.21 × 8 =
  37. 37.56 × 8 =
  38. 38.56 × 4 =
  39. 39.53 × 8 =
  40. 40.42 × 8 =

Answer key

  1. 396
  2. 340
  3. 416
  4. 452
  5. 176
  6. 184
  7. 224
  8. 384
  9. 592
  10. 592
  11. 56
  12. 168
  13. 388
  14. 132
  15. 360
  16. 212
  17. 252
  18. 456
  19. 208
  20. 60
  21. 384
  22. 164
  23. 116
  24. 536
  25. 272
  26. 320
  27. 324
  28. 80
  29. 328
  30. 560
  31. 600
  32. 464
  33. 424
  34. 184
  35. 88
  36. 168
  37. 448
  38. 224
  39. 424
  40. 336

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