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a fost răspuns

ex:3.................

Ex3 class=

Răspuns :

4/5×15/8=60/40
7/10×20/21=140/210
32/48×16/32=512/1536
11/12×24/33=264/396
33/44×77/88=2541/3872
1313/3131×13/31=17061/97061