=-7/3-9-225/100+3/10-5+(-27/-4)
=-700/300-675/300+90/300+2025/300-9-5
=740/300-14=37/15-14
=2又7/15-14=-11又8/15
*=这个是又的意思 ③=这种带圆圈的是幂的意思
=-7/3-9-225/100+3/10-5+(-27/-4)
=-700/300-675/300+90/300+2025/300-9-5
=740/300-14=37/15-14
=2又7/15-14=-11又8/15