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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 965 · 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. 1.19 × 8 =
  2. 2.134 × 4 =
  3. 3.18 × 4 =
  4. 4.45 × 8 =
  5. 5.49 × 4 =
  6. 6.70 × 8 =
  7. 7.73 × 8 =
  8. 8.44 × 4 =
  9. 9.20 × 8 =
  10. 10.62 × 8 =
  11. 11.61 × 4 =
  12. 12.99 × 4 =
  13. 13.52 × 8 =
  14. 14.95 × 4 =
  15. 15.43 × 4 =
  16. 16.60 × 4 =
  17. 17.24 × 8 =
  18. 18.36 × 8 =
  19. 19.125 × 4 =
  20. 20.30 × 8 =
  21. 21.26 × 4 =
  22. 22.113 × 4 =
  23. 23.28 × 4 =
  24. 24.31 × 8 =
  25. 25.33 × 8 =
  26. 26.19 × 4 =
  27. 27.133 × 4 =
  28. 28.47 × 8 =
  29. 29.68 × 8 =
  30. 30.31 × 4 =
  31. 31.47 × 8 =
  32. 32.13 × 8 =
  33. 33.37 × 8 =
  34. 34.62 × 8 =
  35. 35.23 × 8 =
  36. 36.57 × 4 =
  37. 37.74 × 8 =
  38. 38.63 × 8 =
  39. 39.36 × 8 =
  40. 40.15 × 4 =

Answer key

  1. 152
  2. 536
  3. 72
  4. 360
  5. 196
  6. 560
  7. 584
  8. 176
  9. 160
  10. 496
  11. 244
  12. 396
  13. 416
  14. 380
  15. 172
  16. 240
  17. 192
  18. 288
  19. 500
  20. 240
  21. 104
  22. 452
  23. 112
  24. 248
  25. 264
  26. 76
  27. 532
  28. 376
  29. 544
  30. 124
  31. 376
  32. 104
  33. 296
  34. 496
  35. 184
  36. 228
  37. 592
  38. 504
  39. 288
  40. 60

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