Ответы на вопрос:
12+6=18 18+3=21 21+3/2=24/3 24/3+3/4=27/7 27/7+3/8=30/15 30/15+3/16=33/31 33/31+3/32=36/63 сократить36/63 на 3=12/21
12 + 6 + 3 + 3/2 + 3/4 + 3/8 + 3/16 + 3/32 = 21 + 48/32 + 24/32 + 12/32 + 6/32 + 3/32 = 21 90/32 = 23 26/32 = = 23 13/16
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