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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 944 · 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. 1.32 × 4 =
  2. 2.22 × 8 =
  3. 3.69 × 4 =
  4. 4.63 × 4 =
  5. 5.27 × 8 =
  6. 6.26 × 8 =
  7. 7.74 × 4 =
  8. 8.71 × 4 =
  9. 9.62 × 8 =
  10. 10.38 × 8 =
  11. 11.86 × 4 =
  12. 12.45 × 4 =
  13. 13.143 × 4 =
  14. 14.131 × 4 =
  15. 15.44 × 8 =
  16. 16.21 × 8 =
  17. 17.18 × 4 =
  18. 18.114 × 4 =
  19. 19.120 × 4 =
  20. 20.148 × 4 =
  21. 21.62 × 4 =
  22. 22.27 × 8 =
  23. 23.36 × 8 =
  24. 24.129 × 4 =
  25. 25.74 × 8 =
  26. 26.50 × 8 =
  27. 27.45 × 8 =
  28. 28.18 × 8 =
  29. 29.40 × 4 =
  30. 30.18 × 8 =
  31. 31.74 × 8 =
  32. 32.44 × 8 =
  33. 33.60 × 8 =
  34. 34.72 × 8 =
  35. 35.94 × 4 =
  36. 36.30 × 4 =
  37. 37.27 × 8 =
  38. 38.16 × 4 =
  39. 39.159 × 4 =
  40. 40.82 × 4 =

Answer key

  1. 128
  2. 176
  3. 276
  4. 252
  5. 216
  6. 208
  7. 296
  8. 284
  9. 496
  10. 304
  11. 344
  12. 180
  13. 572
  14. 524
  15. 352
  16. 168
  17. 72
  18. 456
  19. 480
  20. 592
  21. 248
  22. 216
  23. 288
  24. 516
  25. 592
  26. 400
  27. 360
  28. 144
  29. 160
  30. 144
  31. 592
  32. 352
  33. 480
  34. 576
  35. 376
  36. 120
  37. 216
  38. 64
  39. 636
  40. 328

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