简算下面各题。
|
| (1)689+194 =689+200-6 =889-6 =883 | (2)624﹣297 =624-300+3 =324+3 =327 | (3)785﹣184﹣216 =785-(184+216) =785-400 =385 |
| (4)451﹣202 =451-200-2 =251-2 =249 | (5)234+187+66 =(234+66)+187 =300+187 =487 | (6)563﹣(263+154) =563-263-154 =300-154 =146 |
编辑:chaxungu时间:2026-04-27 13:19:04分类:小学数学题库
简算下面各题。
|
| (1)689+194 =689+200-6 =889-6 =883 | (2)624﹣297 =624-300+3 =324+3 =327 | (3)785﹣184﹣216 =785-(184+216) =785-400 =385 |
| (4)451﹣202 =451-200-2 =251-2 =249 | (5)234+187+66 =(234+66)+187 =300+187 =487 | (6)563﹣(263+154) =563-263-154 =300-154 =146 |