应用乘法交换律和乘法分配律进行简算
25ㄨ199ㄨ25
=25ㄨ25ㄨ199
=25ㄨ25ㄨ(200-1)
=25ㄨ(25ㄨ200)-25ㄨ25ㄨ1
=25ㄨ5000-25ㄨ5ㄨ5
=125000-125ㄨ5
=125000-625
=124375
另外一种情况是不是题目符号有错误，如果是，那么
25ㄨ199+25
=25ㄨ(199+1)
=25ㄨ200
=5000
=25×（200-1）×25
=（5000-25）×25
=125000-625
=124375
25*25*199＝625*200-625=124375
25×199×25
=25×(200-1)×25
=25×200×25-25×25
=25×2×2500-625
=50×2500-625
=125000-625
=124375
25×199×25
=（25×25）×（200-1）
=625×200-625×1
=125000-625
=124375
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024