D(100)=(1,2,4,5,10,20,25,50,100)
(2,5,25)-простые числа
1) (9+231):15-125:25=240:15-5=16-5=11
2) 129-(500-450):10=129-5=124
3) (270-120):6+8*(43-20)= 150:6+8*23=25+184=209
4) (77436-436):100=77000:100=77
13 2/5-11,2:9 1/3=26/5 - 112/10*1/9 *1/3=26/5 - 56/5*1/9*1/3=26/5-56/135=702-56/135=646/135=4 106/135
3,6+4,8*(8 3/4 - 7 5/6)=3,6+48/10*(2*3-35/6)=3,6+48/10*36-35/6=3,6+48/10*1/6=3,6+8/10=3,6+4/5=3,6+0,8=4,4