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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 977 · 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. 1.52 × 4 =
  2. 2.90 × 4 =
  3. 3.119 × 4 =
  4. 4.61 × 4 =
  5. 5.43 × 4 =
  6. 6.106 × 4 =
  7. 7.93 × 4 =
  8. 8.17 × 8 =
  9. 9.118 × 4 =
  10. 10.134 × 4 =
  11. 11.68 × 4 =
  12. 12.67 × 4 =
  13. 13.127 × 4 =
  14. 14.59 × 8 =
  15. 15.47 × 4 =
  16. 16.74 × 4 =
  17. 17.53 × 8 =
  18. 18.82 × 4 =
  19. 19.158 × 4 =
  20. 20.18 × 8 =
  21. 21.148 × 4 =
  22. 22.152 × 4 =
  23. 23.22 × 4 =
  24. 24.29 × 8 =
  25. 25.128 × 4 =
  26. 26.39 × 8 =
  27. 27.49 × 8 =
  28. 28.19 × 4 =
  29. 29.75 × 8 =
  30. 30.127 × 4 =
  31. 31.60 × 8 =
  32. 32.33 × 8 =
  33. 33.18 × 8 =
  34. 34.44 × 8 =
  35. 35.20 × 4 =
  36. 36.26 × 4 =
  37. 37.149 × 4 =
  38. 38.38 × 8 =
  39. 39.47 × 4 =
  40. 40.46 × 8 =

Answer key

  1. 208
  2. 360
  3. 476
  4. 244
  5. 172
  6. 424
  7. 372
  8. 136
  9. 472
  10. 536
  11. 272
  12. 268
  13. 508
  14. 472
  15. 188
  16. 296
  17. 424
  18. 328
  19. 632
  20. 144
  21. 592
  22. 608
  23. 88
  24. 232
  25. 512
  26. 312
  27. 392
  28. 76
  29. 600
  30. 508
  31. 480
  32. 264
  33. 144
  34. 352
  35. 80
  36. 104
  37. 596
  38. 304
  39. 188
  40. 368

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