用简便方法计算。
|
(1)原式=5-3.72+( + )=5-3.72+1 =2.28 | (2)原式=13.85+ -( + )=13.85+0.06-4 =9.91 | (3)原式=20.75- +( + )=20.75-0.75+1 =21 |
编辑:chaxungu时间:2026-04-27 14:03:20分类:小学数学题库
用简便方法计算。
|
(1)原式=5-3.72+( + )=5-3.72+1 =2.28 | (2)原式=13.85+ -( + )=13.85+0.06-4 =9.91 | (3)原式=20.75- +( + )=20.75-0.75+1 =21 |