Ответ:
2 1/2 : 2 1/4=5/4:9/4=5/4*4/9=5/9
(5-1/2)-4=4 1/2-4=1/2
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Ответ:
2 1/2 : 2 1/4=5/4:9/4=5/4*4/9=5/9
(5-1/2)-4=4 1/2-4=1/2