39*148/149+148*86/149+48*74/149

问题描述:

39*148/149+148*86/149+48*74/149
jianbian jianbian

39*148/149+148*86/149+48*74/149
=39*148/149+86*148/149+24*148/149
=148/149*(39+86+24)
=148/149*149
=148