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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 972 · 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. 1.75 × 8 =
  2. 2.69 × 8 =
  3. 3.125 × 4 =
  4. 4.23 × 8 =
  5. 5.96 × 4 =
  6. 6.34 × 4 =
  7. 7.67 × 8 =
  8. 8.25 × 8 =
  9. 9.61 × 8 =
  10. 10.73 × 8 =
  11. 11.23 × 8 =
  12. 12.27 × 4 =
  13. 13.83 × 4 =
  14. 14.23 × 8 =
  15. 15.51 × 8 =
  16. 16.15 × 8 =
  17. 17.13 × 8 =
  18. 18.58 × 4 =
  19. 19.78 × 4 =
  20. 20.67 × 8 =
  21. 21.107 × 4 =
  22. 22.69 × 8 =
  23. 23.28 × 4 =
  24. 24.29 × 4 =
  25. 25.34 × 8 =
  26. 26.64 × 4 =
  27. 27.71 × 4 =
  28. 28.41 × 8 =
  29. 29.37 × 8 =
  30. 30.60 × 4 =
  31. 31.48 × 8 =
  32. 32.123 × 4 =
  33. 33.46 × 8 =
  34. 34.27 × 8 =
  35. 35.118 × 4 =
  36. 36.140 × 4 =
  37. 37.53 × 8 =
  38. 38.58 × 8 =
  39. 39.59 × 8 =
  40. 40.39 × 8 =

Answer key

  1. 600
  2. 552
  3. 500
  4. 184
  5. 384
  6. 136
  7. 536
  8. 200
  9. 488
  10. 584
  11. 184
  12. 108
  13. 332
  14. 184
  15. 408
  16. 120
  17. 104
  18. 232
  19. 312
  20. 536
  21. 428
  22. 552
  23. 112
  24. 116
  25. 272
  26. 256
  27. 284
  28. 328
  29. 296
  30. 240
  31. 384
  32. 492
  33. 368
  34. 216
  35. 472
  36. 560
  37. 424
  38. 464
  39. 472
  40. 312

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