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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 958 · 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. 1.94 × 4 =
  2. 2.112 × 4 =
  3. 3.13 × 8 =
  4. 4.18 × 8 =
  5. 5.69 × 8 =
  6. 6.58 × 8 =
  7. 7.46 × 8 =
  8. 8.42 × 4 =
  9. 9.73 × 8 =
  10. 10.97 × 4 =
  11. 11.118 × 4 =
  12. 12.69 × 8 =
  13. 13.55 × 8 =
  14. 14.18 × 8 =
  15. 15.114 × 4 =
  16. 16.119 × 4 =
  17. 17.22 × 8 =
  18. 18.27 × 8 =
  19. 19.58 × 8 =
  20. 20.47 × 8 =
  21. 21.50 × 4 =
  22. 22.93 × 4 =
  23. 23.23 × 4 =
  24. 24.69 × 4 =
  25. 25.108 × 4 =
  26. 26.72 × 8 =
  27. 27.59 × 8 =
  28. 28.120 × 4 =
  29. 29.98 × 4 =
  30. 30.61 × 8 =
  31. 31.110 × 4 =
  32. 32.17 × 8 =
  33. 33.62 × 4 =
  34. 34.44 × 4 =
  35. 35.67 × 8 =
  36. 36.70 × 4 =
  37. 37.40 × 8 =
  38. 38.33 × 4 =
  39. 39.152 × 4 =
  40. 40.31 × 4 =

Answer key

  1. 376
  2. 448
  3. 104
  4. 144
  5. 552
  6. 464
  7. 368
  8. 168
  9. 584
  10. 388
  11. 472
  12. 552
  13. 440
  14. 144
  15. 456
  16. 476
  17. 176
  18. 216
  19. 464
  20. 376
  21. 200
  22. 372
  23. 92
  24. 276
  25. 432
  26. 576
  27. 472
  28. 480
  29. 392
  30. 488
  31. 440
  32. 136
  33. 248
  34. 176
  35. 536
  36. 280
  37. 320
  38. 132
  39. 608
  40. 124

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