{[3又3/4÷(3/4-1)+(1-0.6)*(-5/2)²]÷(-5/3)-20}*(-1)的37次方
=[(-15/4÷1/4+0.4x25/4)x(-3/5)-20]x(-1)
=(-15+2.5)x3/5+20
=-12.5x3/5+20
=-7.5+20
=12.5
如果本题有什么不明白可以追问,如果满意请点击“选为满意答案”
{[3又3/4÷(3/4-1)+(1-0.6)*(-5/2)²]÷(-5/3)-20}*(-1)的37次方
=[(-15/4÷1/4+0.4x25/4)x(-3/5)-20]x(-1)
=(-15+2.5)x3/5+20
=-12.5x3/5+20
=-7.5+20
=12.5
如果本题有什么不明白可以追问,如果满意请点击“选为满意答案”