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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 950 · 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. 1.50 × 8 =
  2. 2.28 × 8 =
  3. 3.111 × 4 =
  4. 4.38 × 4 =
  5. 5.153 × 4 =
  6. 6.42 × 4 =
  7. 7.43 × 8 =
  8. 8.103 × 4 =
  9. 9.50 × 8 =
  10. 10.142 × 4 =
  11. 11.101 × 4 =
  12. 12.42 × 8 =
  13. 13.20 × 8 =
  14. 14.16 × 4 =
  15. 15.106 × 4 =
  16. 16.122 × 4 =
  17. 17.155 × 4 =
  18. 18.151 × 4 =
  19. 19.39 × 4 =
  20. 20.24 × 8 =
  21. 21.44 × 4 =
  22. 22.156 × 4 =
  23. 23.56 × 8 =
  24. 24.37 × 8 =
  25. 25.147 × 4 =
  26. 26.88 × 4 =
  27. 27.157 × 4 =
  28. 28.65 × 8 =
  29. 29.56 × 8 =
  30. 30.34 × 8 =
  31. 31.69 × 8 =
  32. 32.69 × 8 =
  33. 33.50 × 8 =
  34. 34.101 × 4 =
  35. 35.48 × 8 =
  36. 36.41 × 4 =
  37. 37.152 × 4 =
  38. 38.121 × 4 =
  39. 39.43 × 8 =
  40. 40.66 × 4 =

Answer key

  1. 400
  2. 224
  3. 444
  4. 152
  5. 612
  6. 168
  7. 344
  8. 412
  9. 400
  10. 568
  11. 404
  12. 336
  13. 160
  14. 64
  15. 424
  16. 488
  17. 620
  18. 604
  19. 156
  20. 192
  21. 176
  22. 624
  23. 448
  24. 296
  25. 588
  26. 352
  27. 628
  28. 520
  29. 448
  30. 272
  31. 552
  32. 552
  33. 400
  34. 404
  35. 384
  36. 164
  37. 608
  38. 484
  39. 344
  40. 264

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