July 2022 2 7 Report
Определите, верно ли равенство:
а) 3а × ( -45 ) = -270а;
б) -9а × 12b = -108b;
в) 5/7х × 7/8 × у = 5/8ху;
г) 3 1/2m × 2 3/7n × 1/17k = 1/2mnk
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