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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 894 · 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. 1.57 × 8 =
  2. 2.28 × 4 =
  3. 3.93 × 4 =
  4. 4.35 × 4 =
  5. 5.49 × 4 =
  6. 6.61 × 8 =
  7. 7.64 × 8 =
  8. 8.72 × 4 =
  9. 9.119 × 4 =
  10. 10.42 × 4 =
  11. 11.75 × 8 =
  12. 12.123 × 4 =
  13. 13.157 × 4 =
  14. 14.39 × 4 =
  15. 15.71 × 4 =
  16. 16.34 × 8 =
  17. 17.46 × 4 =
  18. 18.32 × 8 =
  19. 19.96 × 4 =
  20. 20.22 × 8 =
  21. 21.73 × 8 =
  22. 22.37 × 8 =
  23. 23.56 × 8 =
  24. 24.67 × 4 =
  25. 25.74 × 8 =
  26. 26.107 × 4 =
  27. 27.52 × 4 =
  28. 28.63 × 8 =
  29. 29.14 × 8 =
  30. 30.44 × 4 =
  31. 31.48 × 8 =
  32. 32.66 × 4 =
  33. 33.44 × 8 =
  34. 34.155 × 4 =
  35. 35.43 × 4 =
  36. 36.50 × 8 =
  37. 37.24 × 8 =
  38. 38.53 × 4 =
  39. 39.47 × 8 =
  40. 40.60 × 8 =

Answer key

  1. 456
  2. 112
  3. 372
  4. 140
  5. 196
  6. 488
  7. 512
  8. 288
  9. 476
  10. 168
  11. 600
  12. 492
  13. 628
  14. 156
  15. 284
  16. 272
  17. 184
  18. 256
  19. 384
  20. 176
  21. 584
  22. 296
  23. 448
  24. 268
  25. 592
  26. 428
  27. 208
  28. 504
  29. 112
  30. 176
  31. 384
  32. 264
  33. 352
  34. 620
  35. 172
  36. 400
  37. 192
  38. 212
  39. 376
  40. 480

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