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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 219 · 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. 1.88 × 4 =
  2. 2.30 × 8 =
  3. 3.22 × 4 =
  4. 4.72 × 4 =
  5. 5.55 × 8 =
  6. 6.33 × 8 =
  7. 7.58 × 8 =
  8. 8.59 × 8 =
  9. 9.21 × 4 =
  10. 10.76 × 4 =
  11. 11.24 × 8 =
  12. 12.33 × 8 =
  13. 13.20 × 8 =
  14. 14.70 × 8 =
  15. 15.21 × 4 =
  16. 16.47 × 8 =
  17. 17.51 × 8 =
  18. 18.25 × 4 =
  19. 19.48 × 4 =
  20. 20.136 × 4 =
  21. 21.72 × 4 =
  22. 22.98 × 4 =
  23. 23.52 × 4 =
  24. 24.153 × 4 =
  25. 25.64 × 4 =
  26. 26.32 × 8 =
  27. 27.72 × 4 =
  28. 28.22 × 4 =
  29. 29.120 × 4 =
  30. 30.70 × 8 =
  31. 31.14 × 4 =
  32. 32.152 × 4 =
  33. 33.29 × 8 =
  34. 34.40 × 4 =
  35. 35.46 × 8 =
  36. 36.36 × 8 =
  37. 37.120 × 4 =
  38. 38.24 × 8 =
  39. 39.110 × 4 =
  40. 40.33 × 4 =

Answer key

  1. 352
  2. 240
  3. 88
  4. 288
  5. 440
  6. 264
  7. 464
  8. 472
  9. 84
  10. 304
  11. 192
  12. 264
  13. 160
  14. 560
  15. 84
  16. 376
  17. 408
  18. 100
  19. 192
  20. 544
  21. 288
  22. 392
  23. 208
  24. 612
  25. 256
  26. 256
  27. 288
  28. 88
  29. 480
  30. 560
  31. 56
  32. 608
  33. 232
  34. 160
  35. 368
  36. 288
  37. 480
  38. 192
  39. 440
  40. 132

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