2.7x4.8+2.7x5.2=2.7x(4.8+5.2)=2.7x10=27905x99+905=905x(99+1)=905x100=9050013x(10+0.2)=13x10+13x0.2=130+2.6=132.6 25x48=25x(40+8)=25x40+25x8=1000+200=1200 36x(2/9+7/12)=36x2/9+36x7/12=8+21=29