ЕурокиДЗбезмороки80.\ Еуроки\ -\ ДЗ\ без\ мороки
600 :20=600 :(2⋅10)=
=(600 :10) :2=60 :2=30.
300 :15=300 :(5⋅3)=
=(300 :3) :5=100 :5=20.
420 :14=420 :(2⋅7)=
=(420 :7) :2=60 :2=30.
5 600 :800=
=5 600 :(8⋅100)=
=(5 600 :100) :8=56 :8=
=7.