September 2021 1 9 Report
ХЕЛП
а) – 2b • (– 8); , б) 5 2/3 а • (- 3/17 b);, в) 0,7 • a • b • (–100); , г) - 2 2/7 mn • (– 1);, д) – 6m • (– 5k); , е) – 8x • 1,2y;, ж) 2,3 • (– 3х) • (– 2у); , з) – 0,8 • 50а • (– 4,1b)
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