101x45-45=45x(100-1)=4500
101x93-93x1=93x(101-1)=9300
125x88=125x(80+8)=125x80+125x8=10000+1000=11000
3x25x2=3x(25x2)=50x3=150
169x53-69x53=(169-69)x53=5300
45x98=45x(100-2)=4500-90=4410
99x(100+2)=9900+99x2=9900+(100-1)x2=9900+200-2=9900+198=10098
102x76=(100+2)x76=7600+152=7752