Математика 4 класс x+450=700 240÷x=80 x-350=240 70×=490
X+450=700 x=700-450 x=250 240/x=80 x=240/80=3 x-350=240 x=340+350 x=690 70x=490 x=7
X+450=700 240÷x=80. x-350=240. 70×x=4p0 x=700-450. x=240÷80. x=350+240. x=490÷70 x=250. x=3. x=590. x=7