Найдите значение выражения 2 × (1 / 10)² – 2 / 5 × 3 / 10
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2 × (1 / 10)² – 2 / 5 × 3 / 10= 2*1/10*1/10-2/5*3/10=1/5*1/10-2/5*3/10=1/50-6/50=-5/50=-1/10