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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 897 · 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. 1.17 × 4 =
  2. 2.27 × 4 =
  3. 3.152 × 4 =
  4. 4.17 × 8 =
  5. 5.60 × 8 =
  6. 6.126 × 4 =
  7. 7.54 × 8 =
  8. 8.154 × 4 =
  9. 9.23 × 4 =
  10. 10.147 × 4 =
  11. 11.16 × 4 =
  12. 12.93 × 4 =
  13. 13.29 × 8 =
  14. 14.119 × 4 =
  15. 15.60 × 8 =
  16. 16.52 × 4 =
  17. 17.56 × 8 =
  18. 18.13 × 8 =
  19. 19.38 × 4 =
  20. 20.17 × 8 =
  21. 21.34 × 8 =
  22. 22.93 × 4 =
  23. 23.112 × 4 =
  24. 24.157 × 4 =
  25. 25.48 × 8 =
  26. 26.42 × 8 =
  27. 27.26 × 8 =
  28. 28.155 × 4 =
  29. 29.132 × 4 =
  30. 30.67 × 8 =
  31. 31.43 × 4 =
  32. 32.57 × 8 =
  33. 33.23 × 8 =
  34. 34.156 × 4 =
  35. 35.14 × 8 =
  36. 36.21 × 8 =
  37. 37.36 × 8 =
  38. 38.80 × 4 =
  39. 39.125 × 4 =
  40. 40.95 × 4 =

Answer key

  1. 68
  2. 108
  3. 608
  4. 136
  5. 480
  6. 504
  7. 432
  8. 616
  9. 92
  10. 588
  11. 64
  12. 372
  13. 232
  14. 476
  15. 480
  16. 208
  17. 448
  18. 104
  19. 152
  20. 136
  21. 272
  22. 372
  23. 448
  24. 628
  25. 384
  26. 336
  27. 208
  28. 620
  29. 528
  30. 536
  31. 172
  32. 456
  33. 184
  34. 624
  35. 112
  36. 168
  37. 288
  38. 320
  39. 500
  40. 380

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