"78x65的验算"...78x65的验算
"607x38的验算"...607x38的验算
"637乘8怎么验算"...637乘8怎么验算
"78x75的验算"...78x75的验算
"63x58验算"...63x58验算
"732-186的验算"...732-186的验算
"78x49的验算"...78x49的验算
"685+397的验算"...685+397的验算
"78x45验算"...78x45验算
"78+395验算"...78+395验算
