1.
竖式计算。
(1)400-128=
(2)305-187= (3)208-189= | (4)900-327=
| (2)156+392= (3)369+432= | (4)137+445=
| (2)502-154= (3)53÷7= | (4)33÷5=
| (2)850-175= (3)52+87= | (4)305-178=
| (2)132+576= (3)608-129= | (4)780-287=
| (2)316+184= (3)824+179= | (4)216+275=
| (2)539-289 | (3)247+369 (4)334+268 | (5)708-539 | (6)861-578
| 589+304= | △518-139= 600-148= | △708-169= | 183+124=
|