用简便方法计算(1)678+(354+322)(2)283+147+17+1653(3)384-(37+184)(4)2904-1327-173(5)65
答案:1 悬赏:80 手机版
解决时间 2021-01-30 15:17
- 提问者网友:相思似海深
- 2021-01-29 20:53
用简便方法计算(1)678+(354+322)(2)283+147+17+1653(3)384-(37+184)(4)2904-1327-173(5)65
最佳答案
- 五星知识达人网友:煞尾
- 2021-01-29 21:45
(1)678+354+322 =678+322+354 =1000+354 =1354; (2)283+147+17+1653 =283+17+(147+1653) =300+1800 =2100; (3)384-(37+184) =384-(184+37) =384-184-37 =200-37 =163; (4)2904-1327-173 =2904-(1327+173) =2904-1500 =1404; (5)653-197 =653-200+3 =453+3 =456; (6)125×17-125 =125×(17-1) =125×16 =125×8×2 =1000×2 =2000; (7)235×99 =235×(100-1) =235×100-235×1 =23500-235 =23265; (8)(1300-520)÷13 =1300÷13-520÷13 =100-40 =60; (9)67×21+18×21+85×79 =21×(67+18)+85×79 =21×85+85×79 =85×(21+79) =85×100 =8500; (10)222222×999999 =222222×(1000000-1) =222222×1000000-222222×1 =222222000000-222222 =222221777778. |
我要举报
如以上回答内容为低俗、色情、不良、暴力、侵权、涉及违法等信息,可以点下面链接进行举报!
点此我要举报以上问答信息
大家都在看
推荐资讯