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Автор - влада0072014

(6.3 :1 2/5 - 2 1/20) * 1.8
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Ответ

Автор - stiklin
Решим по действиям:
1) 6,3 : 1  2/5 = 6  3/10 : 1  2/5 = 4  1/2
2) 4  1/2 - 2  1/20 = 2  9/20
3) 2  9/20 * 1,8 = 2  9/20 * 1  8/10 = 4  41/100 = 4,41

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