2/1乘以根号8减去根号0.5减去根号下4又1/2加上2倍的根号50
网友回答
(1/2) ×(√8 )-(√0.5 )-[√(4+1/2)]+2(√50)
=(1/2) ×(2√2)-(√2/2)-[(3√2)/2]+(10√2)
=(11√2)-(2√2)
=9√2文字叙述：二分之一乘以根号8-根号0.5-根号下4又二分之一+2倍根号50
=二分之一乘以2倍根号2-二分之根号2-二分之3倍根号2+10倍根号2
=根号2-二分之根号2-二分之3倍根号2+10倍根号2
=11倍根号2-2倍根号2
=9倍根号2.