0.85-0.2= 0.81-0.59= 0.6-0.3=
0.81+9.6= 0.57-0.1= 0.98-0.3=
0.18+3.4= 0.43+0.62= 0.71-0.48=
0.44-0.3= 0.18+3.9= 0.64+0.81=
0.3+0.81= 0.6-0.28= 0.3+1.5=
0.8-0.7= 0.29+0.4= 0.31+0.61=
0.2+0.33= 0.57+1= 0.85+0.9=
0.84-0.16= 0.33-0.11= 0.81+5=
0.9+7.9= 0.43+6.5= 0.7+6.2=
0.8-0.21= 0.99+1.1= 0.85-0.6=
0.9+6.6= 0.84-0.1= 0.6-0.57=
0.49-0.1= 0.51+2.8= 0.68+0.9=
0.6+5.2= 0.46+0.67= 0.5+3.9=
所需点数：2
