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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 973 · 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. 1.74 × 4 =
  2. 2.57 × 8 =
  3. 3.65 × 4 =
  4. 4.15 × 4 =
  5. 5.118 × 4 =
  6. 6.74 × 4 =
  7. 7.75 × 8 =
  8. 8.15 × 4 =
  9. 9.64 × 8 =
  10. 10.40 × 8 =
  11. 11.150 × 4 =
  12. 12.104 × 4 =
  13. 13.21 × 8 =
  14. 14.53 × 4 =
  15. 15.64 × 8 =
  16. 16.51 × 4 =
  17. 17.57 × 8 =
  18. 18.15 × 4 =
  19. 19.117 × 4 =
  20. 20.55 × 4 =
  21. 21.129 × 4 =
  22. 22.20 × 8 =
  23. 23.74 × 4 =
  24. 24.32 × 4 =
  25. 25.133 × 4 =
  26. 26.47 × 4 =
  27. 27.30 × 8 =
  28. 28.40 × 4 =
  29. 29.159 × 4 =
  30. 30.56 × 4 =
  31. 31.32 × 4 =
  32. 32.49 × 8 =
  33. 33.127 × 4 =
  34. 34.129 × 4 =
  35. 35.74 × 8 =
  36. 36.128 × 4 =
  37. 37.160 × 4 =
  38. 38.141 × 4 =
  39. 39.51 × 8 =
  40. 40.129 × 4 =

Answer key

  1. 296
  2. 456
  3. 260
  4. 60
  5. 472
  6. 296
  7. 600
  8. 60
  9. 512
  10. 320
  11. 600
  12. 416
  13. 168
  14. 212
  15. 512
  16. 204
  17. 456
  18. 60
  19. 468
  20. 220
  21. 516
  22. 160
  23. 296
  24. 128
  25. 532
  26. 188
  27. 240
  28. 160
  29. 636
  30. 224
  31. 128
  32. 392
  33. 508
  34. 516
  35. 592
  36. 512
  37. 640
  38. 564
  39. 408
  40. 516

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