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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 691 · 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. 1.149 × 4 =
  2. 2.75 × 4 =
  3. 3.54 × 4 =
  4. 4.63 × 4 =
  5. 5.70 × 4 =
  6. 6.49 × 8 =
  7. 7.43 × 8 =
  8. 8.60 × 4 =
  9. 9.67 × 4 =
  10. 10.57 × 8 =
  11. 11.65 × 8 =
  12. 12.55 × 8 =
  13. 13.117 × 4 =
  14. 14.83 × 4 =
  15. 15.56 × 8 =
  16. 16.14 × 8 =
  17. 17.54 × 4 =
  18. 18.93 × 4 =
  19. 19.74 × 8 =
  20. 20.43 × 4 =
  21. 21.104 × 4 =
  22. 22.140 × 4 =
  23. 23.105 × 4 =
  24. 24.105 × 4 =
  25. 25.18 × 8 =
  26. 26.18 × 4 =
  27. 27.31 × 8 =
  28. 28.75 × 8 =
  29. 29.46 × 4 =
  30. 30.83 × 4 =
  31. 31.54 × 8 =
  32. 32.136 × 4 =
  33. 33.63 × 4 =
  34. 34.70 × 8 =
  35. 35.24 × 8 =
  36. 36.53 × 4 =
  37. 37.33 × 8 =
  38. 38.34 × 4 =
  39. 39.45 × 4 =
  40. 40.67 × 8 =

Answer key

  1. 596
  2. 300
  3. 216
  4. 252
  5. 280
  6. 392
  7. 344
  8. 240
  9. 268
  10. 456
  11. 520
  12. 440
  13. 468
  14. 332
  15. 448
  16. 112
  17. 216
  18. 372
  19. 592
  20. 172
  21. 416
  22. 560
  23. 420
  24. 420
  25. 144
  26. 72
  27. 248
  28. 600
  29. 184
  30. 332
  31. 432
  32. 544
  33. 252
  34. 560
  35. 192
  36. 212
  37. 264
  38. 136
  39. 180
  40. 536

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