3 1/8-2-4/5,4-(2 3/4+1/5)  вычислите.
сравните:1/6+1/2*1/2+1/5,2-2/3*3-2/3

3 1/8-2-4/5=1 1\8-4\5=1 5\40-32\40=44\40-32\40=12\404-(2 3/4+1/5) =4-(11\4+1\5)=4-(55\20+4\20)=4-59\20=80\20-59\20=21\20=1 1\201/6+1/2*1/2+1/5=1\6+1\4+1\5=10\60+15\60+12\60=37\60           2-2/3*3-2/3=2-2-2\3=-2\3-2\3>37\60