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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 864 · 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 × 4 =
  2. 2.22 × 8 =
  3. 3.20 × 4 =
  4. 4.15 × 4 =
  5. 5.130 × 4 =
  6. 6.16 × 8 =
  7. 7.157 × 4 =
  8. 8.70 × 4 =
  9. 9.57 × 4 =
  10. 10.84 × 4 =
  11. 11.33 × 4 =
  12. 12.151 × 4 =
  13. 13.73 × 8 =
  14. 14.32 × 8 =
  15. 15.50 × 8 =
  16. 16.122 × 4 =
  17. 17.43 × 8 =
  18. 18.58 × 8 =
  19. 19.149 × 4 =
  20. 20.69 × 8 =
  21. 21.84 × 4 =
  22. 22.44 × 4 =
  23. 23.52 × 8 =
  24. 24.45 × 4 =
  25. 25.61 × 4 =
  26. 26.21 × 8 =
  27. 27.18 × 4 =
  28. 28.34 × 4 =
  29. 29.98 × 4 =
  30. 30.25 × 8 =
  31. 31.40 × 8 =
  32. 32.25 × 8 =
  33. 33.83 × 4 =
  34. 34.36 × 4 =
  35. 35.30 × 4 =
  36. 36.40 × 4 =
  37. 37.36 × 4 =
  38. 38.130 × 4 =
  39. 39.116 × 4 =
  40. 40.93 × 4 =

Answer key

  1. 168
  2. 176
  3. 80
  4. 60
  5. 520
  6. 128
  7. 628
  8. 280
  9. 228
  10. 336
  11. 132
  12. 604
  13. 584
  14. 256
  15. 400
  16. 488
  17. 344
  18. 464
  19. 596
  20. 552
  21. 336
  22. 176
  23. 416
  24. 180
  25. 244
  26. 168
  27. 72
  28. 136
  29. 392
  30. 200
  31. 320
  32. 200
  33. 332
  34. 144
  35. 120
  36. 160
  37. 144
  38. 520
  39. 464
  40. 372

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