(2\3*6\5-0.08)*10=(4\5-0.08)*10=0.72*10=7.2 36*(1\3)^3+6*(1\3)^2=36*1/27+6*1/9=4/3+2/3=6/3=2 45*(1/3)^4+4*(1/3)^2=45*1/81+4*1/9=5/9+4/9=1