(2.8+2有4/5+280%+14/5)*25 3.6*2.7+18*0.56-1.8*10%÷10% 14/15-94/25+8/150-1/2520-【(1/2+1/3)÷5/6}*1.214/15-94/25+8/150-1/25

问题描述:

(2.8+2有4/5+280%+14/5)*25 3.6*2.7+18*0.56-1.8*10%÷10% 14/15-94/25+8/150-1/25
20-【(1/2+1/3)÷5/6}*1.2
14/15-94/25+8/150-1/25

=20-{5/6x6/5}
=20-1
19