83-27+18 = 74 72-54:9*4 = 48 40+24:8+28 = 71 <span>28:7-1*3 = 1
</span>83-(27+18) = 38 (72-54):9*4 = 8 (40+24):8+28 =36 <span>28:(7-1*3) = 7</span>
3,5:7=0,4
10,4:8=5,2
26,1:3=22,4
28,2:9=18,4
25,8:6=10,4
63:5=12,6
78,1:11=12,50
72,8:13=12,05
65,8:14=25,21