3.5+五分之四+0.8*7.5-80% (4.8-1.6+五分之四)*7.5%

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3.5+五分之四+0.8*7.5-80%(4.8-1.6+五分之四)*7.5%3.5+五分之四+0.8*7.5-80%(4.8-1.6+五分之四)*7.5%3.5+五分之四+0.8*7.5-80%(4

3.5+五分之四+0.8*7.5-80% (4.8-1.6+五分之四)*7.5%
3.5+五分之四+0.8*7.5-80% (4.8-1.6+五分之四)*7.5%

3.5+五分之四+0.8*7.5-80% (4.8-1.6+五分之四)*7.5%
3.5+五分之四+0.8*7.5-80%
=3.5+6
=9.5
(4.8-1.6+五分之四)*7.5%
=4×3/40
=0.3