Ответ:
a=7 7/8
b=1 11/18
a+b= 7 7/8+1 11/18=9
a-b=7 7/8-1 11/18=5 7/9
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Ответ:
a=7 7/8
b=1 11/18
a+b= 7 7/8+1 11/18=9
a-b=7 7/8-1 11/18=5 7/9