November 2021 0 29 Report
Выполни действие : 1) 3/4-1/4; 2) 5/8+3/8; 3) 7/12-5/12; 4) 8/15+2/15;5) 3/10+1/10;6) 17/25-12/25; 7) 1/30+7/308) 28/45-13/45.
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