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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 165 · 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. 1.133 × 4 =
  2. 2.154 × 4 =
  3. 3.102 × 4 =
  4. 4.55 × 8 =
  5. 5.122 × 4 =
  6. 6.23 × 8 =
  7. 7.52 × 4 =
  8. 8.19 × 4 =
  9. 9.91 × 4 =
  10. 10.35 × 8 =
  11. 11.110 × 4 =
  12. 12.28 × 4 =
  13. 13.152 × 4 =
  14. 14.52 × 4 =
  15. 15.43 × 8 =
  16. 16.63 × 4 =
  17. 17.41 × 8 =
  18. 18.34 × 8 =
  19. 19.51 × 8 =
  20. 20.16 × 8 =
  21. 21.51 × 8 =
  22. 22.49 × 8 =
  23. 23.18 × 8 =
  24. 24.49 × 8 =
  25. 25.133 × 4 =
  26. 26.38 × 8 =
  27. 27.146 × 4 =
  28. 28.34 × 8 =
  29. 29.95 × 4 =
  30. 30.84 × 4 =
  31. 31.84 × 4 =
  32. 32.25 × 8 =
  33. 33.65 × 8 =
  34. 34.71 × 8 =
  35. 35.145 × 4 =
  36. 36.49 × 4 =
  37. 37.43 × 8 =
  38. 38.16 × 8 =
  39. 39.27 × 8 =
  40. 40.152 × 4 =

Answer key

  1. 532
  2. 616
  3. 408
  4. 440
  5. 488
  6. 184
  7. 208
  8. 76
  9. 364
  10. 280
  11. 440
  12. 112
  13. 608
  14. 208
  15. 344
  16. 252
  17. 328
  18. 272
  19. 408
  20. 128
  21. 408
  22. 392
  23. 144
  24. 392
  25. 532
  26. 304
  27. 584
  28. 272
  29. 380
  30. 336
  31. 336
  32. 200
  33. 520
  34. 568
  35. 580
  36. 196
  37. 344
  38. 128
  39. 216
  40. 608

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