Ответ:
a) 1/5-2-4/9=9-90-20/45=-101/45
b) 23/18
c) 46/35
d)-21/4
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Ответ:
a) 1/5-2-4/9=9-90-20/45=-101/45
b) 23/18
c) 46/35
d)-21/4