Ответ:
4/9+3/8= 32/72+27/72=59/72
11/16-3/5= 55/80-48/80=7/80
4 4/7+6 1/4= 4+6=10
16/28+7/28=23/28. 10 23/28
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Ответ:
4/9+3/8= 32/72+27/72=59/72
11/16-3/5= 55/80-48/80=7/80
4 4/7+6 1/4= 4+6=10
16/28+7/28=23/28. 10 23/28