简便方法计算下面各题。
|
| (1)2892+299 =2892+300-1 =3192-1 =3191 | (2)327+648+173 =(327+173)+648 =500+648 =1148 |
| (3)6873﹣451﹣549 =6873-(451+549) =6873-1000 =5873 | (4)428﹣98 =428-100+2 =328+2 =330 |
编辑:chaxungu时间:2026-04-27 13:19:04分类:小学数学题库
简便方法计算下面各题。
|
| (1)2892+299 =2892+300-1 =3192-1 =3191 | (2)327+648+173 =(327+173)+648 =500+648 =1148 |
| (3)6873﹣451﹣549 =6873-(451+549) =6873-1000 =5873 | (4)428﹣98 =428-100+2 =328+2 =330 |