题目内容
口算
(1)450÷90= (2)90×60=
(3)63+37= (4)4000÷8=
(1)450+190= (2)5600÷80=
(3)430-270= (4)250×30=
(5)270+380= (6)570+360=
(1) 22×300= (2)170+150=
(3) 630÷30= (4) 450÷50=
(5) (950-500)÷9=