脱式计算 能简便要简便(15.6+80*75%)/12% 1.87/5%-3.14*5(1-4分之1+3分之2-6分之5)*12
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![脱式计算 能简便要简便(15.6+80*75%)/12% 1.87/5%-3.14*5(1-4分之1+3分之2-6分之5)*12](/uploads/image/z/135394-34-4.jpg?t=%E8%84%B1%E5%BC%8F%E8%AE%A1%E7%AE%97+%E8%83%BD%E7%AE%80%E4%BE%BF%E8%A6%81%E7%AE%80%E4%BE%BF%2815.6%2B80%2A75%25%29%2F12%25+1.87%2F5%25-3.14%2A5%EF%BC%881-4%E5%88%86%E4%B9%8B1%2B3%E5%88%86%E4%B9%8B2-6%E5%88%86%E4%B9%8B5%29%2A12)
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脱式计算 能简便要简便(15.6+80*75%)/12% 1.87/5%-3.14*5(1-4分之1+3分之2-6分之5)*12
脱式计算 能简便要简便(15.6+80*75%)/12% 1.87/5%-3.14*5(1-4分之1+3分之2-6分之5)*12
脱式计算 能简便要简便(15.6+80*75%)/12% 1.87/5%-3.14*5(1-4分之1+3分之2-6分之5)*12
(15.6+80*75%)/12%=15.6*3/25+80*3/4*3/25=46.8/25+180/25=226.8/25
1.87/5%-3.14*5
=1.87*100/5-15.7
=187/5-15.7
=37.4-15.7
=21.7
(1-1/4+2/3-5/6)*12=12-3+8-10=7,