Question

用简便方法计算67.5＾2+67.5×45+22.5＾2 急急！

Answer 1

67.5*67.5+67.5*22.5*2+22.5*22.5=22.5*3*22.5*3+22.5*3*22.5*2+22.5*22.522.5*22.5*9+22.5*22.5*6+22.5*22.5=22.5*22.5*16=(22.5*4)*(22.5*4)=90*90=8100

Answer 2

先把22.5的平方化解成67.5×7.5 再把式子合并同类项 为 67.5×120 乘一下就可以了

Answer 3

=67.5^2+2*67.5*22.5+22.5^2=(67.5+22.5)^2=90^2=8100

Answer 4

^是啥意思，次方么？