2除3除7+4除6除14+14除21除49 -------------------------...
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2除3除7+4除6除14+14除21除49-------------------------...2除3除7+4除6除14+14除21除49-------------------------...2除
2除3除7+4除6除14+14除21除49 -------------------------...
2除3除7+4除6除14+14除21除49 -------------------------...
2除3除7+4除6除14+14除21除49 -------------------------...
2÷3÷7 4÷6÷14 14÷21÷49
=2÷3÷7 (2×2)÷(3×2)÷(7×2) (2×7)÷(3×7)÷(7×7)
=2÷3÷7 (2÷3÷7)/2 (2÷3÷7)/7
=2/21×(1 1/2 1/7)
=2/21×23/14
=23/147
4÷7÷9 8÷14÷18 28÷49÷63
=4÷7÷9 (4×2)÷(7×2)÷(9×2) (4×7)÷(7×7)÷(9×7)
=4÷7÷9 (4÷7÷9)/2 (4÷7÷9)/7
=4/63×(1 1/2 1/7)
=4/63×23/14
=46/441