Ответ:
99/160×40/33=3/4
3/4×20/27=5/9
5/9×81/5=9
9-4 1/2=4 1/2
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Ответ:
99/160×40/33=3/4
3/4×20/27=5/9
5/9×81/5=9
9-4 1/2=4 1/2