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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 860 · 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. 1.42 × 8 =
  2. 2.147 × 4 =
  3. 3.25 × 4 =
  4. 4.147 × 4 =
  5. 5.121 × 4 =
  6. 6.137 × 4 =
  7. 7.45 × 4 =
  8. 8.26 × 4 =
  9. 9.42 × 4 =
  10. 10.69 × 8 =
  11. 11.70 × 4 =
  12. 12.38 × 4 =
  13. 13.110 × 4 =
  14. 14.17 × 8 =
  15. 15.65 × 8 =
  16. 16.53 × 8 =
  17. 17.73 × 8 =
  18. 18.60 × 4 =
  19. 19.22 × 4 =
  20. 20.58 × 8 =
  21. 21.110 × 4 =
  22. 22.87 × 4 =
  23. 23.128 × 4 =
  24. 24.40 × 4 =
  25. 25.27 × 4 =
  26. 26.59 × 8 =
  27. 27.18 × 8 =
  28. 28.44 × 8 =
  29. 29.36 × 8 =
  30. 30.140 × 4 =
  31. 31.14 × 8 =
  32. 32.114 × 4 =
  33. 33.56 × 8 =
  34. 34.33 × 8 =
  35. 35.23 × 8 =
  36. 36.111 × 4 =
  37. 37.53 × 8 =
  38. 38.117 × 4 =
  39. 39.20 × 8 =
  40. 40.121 × 4 =

Answer key

  1. 336
  2. 588
  3. 100
  4. 588
  5. 484
  6. 548
  7. 180
  8. 104
  9. 168
  10. 552
  11. 280
  12. 152
  13. 440
  14. 136
  15. 520
  16. 424
  17. 584
  18. 240
  19. 88
  20. 464
  21. 440
  22. 348
  23. 512
  24. 160
  25. 108
  26. 472
  27. 144
  28. 352
  29. 288
  30. 560
  31. 112
  32. 456
  33. 448
  34. 264
  35. 184
  36. 444
  37. 424
  38. 468
  39. 160
  40. 484

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