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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 280 · 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. 1.59 × 8 =
  2. 2.55 × 4 =
  3. 3.89 × 4 =
  4. 4.74 × 8 =
  5. 5.43 × 4 =
  6. 6.43 × 4 =
  7. 7.116 × 4 =
  8. 8.119 × 4 =
  9. 9.50 × 4 =
  10. 10.21 × 4 =
  11. 11.96 × 4 =
  12. 12.18 × 8 =
  13. 13.92 × 4 =
  14. 14.90 × 4 =
  15. 15.142 × 4 =
  16. 16.27 × 8 =
  17. 17.107 × 4 =
  18. 18.121 × 4 =
  19. 19.20 × 4 =
  20. 20.158 × 4 =
  21. 21.14 × 8 =
  22. 22.75 × 4 =
  23. 23.112 × 4 =
  24. 24.112 × 4 =
  25. 25.20 × 8 =
  26. 26.22 × 8 =
  27. 27.46 × 8 =
  28. 28.91 × 4 =
  29. 29.138 × 4 =
  30. 30.37 × 8 =
  31. 31.21 × 8 =
  32. 32.14 × 8 =
  33. 33.38 × 8 =
  34. 34.18 × 8 =
  35. 35.77 × 4 =
  36. 36.81 × 4 =
  37. 37.90 × 4 =
  38. 38.25 × 8 =
  39. 39.73 × 8 =
  40. 40.24 × 4 =

Answer key

  1. 472
  2. 220
  3. 356
  4. 592
  5. 172
  6. 172
  7. 464
  8. 476
  9. 200
  10. 84
  11. 384
  12. 144
  13. 368
  14. 360
  15. 568
  16. 216
  17. 428
  18. 484
  19. 80
  20. 632
  21. 112
  22. 300
  23. 448
  24. 448
  25. 160
  26. 176
  27. 368
  28. 364
  29. 552
  30. 296
  31. 168
  32. 112
  33. 304
  34. 144
  35. 308
  36. 324
  37. 360
  38. 200
  39. 584
  40. 96

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