简便运算(78.6—0.786×25+75%×21.4)÷15×2001

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简便运算(78.6—0.786×25+75%×21.4)÷15×2001
简便运算(78.6—0.786×25+75%×21.4)÷15×2001

简便运算(78.6—0.786×25+75%×21.4)÷15×2001
(78.6—0.786×25+75%×21.4)÷15×2001
=(78.6—78.6×0.25+75%×21.4)÷15×2001
= (78.6×0.75+75%×21.4)÷15×2001
=(78.6+21.4)×0.75÷15×2001
=100×0.75÷15×2001
=75÷15×2001
=5×2001
=10005