| 用简便方法计算。 | ||||
|
| (1)88×0.25×4 =88×1 =88 | (2)2.8×7.2+2.8×2.8 =2.8×(7.2+2.8) =28 |
| (3)10.1×55 =550+5.5 =555.5 | (4)25.74-0.51-4.49 =25.74-5 =20.74 |
编辑:chaxungu时间:2026-04-27 13:34:01分类:小学数学题库
| 用简便方法计算。 | ||||
|
| (1)88×0.25×4 =88×1 =88 | (2)2.8×7.2+2.8×2.8 =2.8×(7.2+2.8) =28 |
| (3)10.1×55 =550+5.5 =555.5 | (4)25.74-0.51-4.49 =25.74-5 =20.74 |