括号中等于(11又3/4+2.25)-(4又3/20+7/20)=14-4又1/2=9.5
原式=125又7/8÷9.5
分子分母同时乘以8
原式=(125×8+7)÷76=1007÷76=13.25
125又7/8÷(11又3/4-4又3/20+2.25-7/20)
=125又7/8÷(11·75-4·15+2·25-0·35)
=125又7/8÷[(11·75+2·25)-(4·15+0·35)]
=125又7/8÷(14-4·5)
=125又7/8÷9·5
=1007/8÷19/2
=1007/8×2/19
=53/4
这个网址的答案是错的!
http://zhidao.baidu.com/question/303579209.html&__bd_tkn__=74bf40343b2594324b23937db5bd34bd8b269ef68078338d51fed8133ea5c69d362ad36bb4bcda3b39bb3949f6bbe47087ac3af56e60b1f4e7eb60157b5cfe379a6eabf8570f03de0125277dd133b8783f039905712bbd89da3a3f7a7620335dbb1708324bc7aaaa9d09faaccbdc8c0acf352bff4da1
就这样算!
不懂的还可以追问!满意请及时采纳! O(∩_∩)O