来自沈春龙的问题
计算:(1)1/5根号900+1/2根号121(2)根号12+根号1/27-根号1/3(3)根号1/7+根号28-根号700(4)根号32-3根号1/2+根号8
计算:(1)1/5根号900+1/2根号121(2)根号12+根号1/27-根号1/3(3)根号1/7+根号28-根号700
(4)根号32-3根号1/2+根号8


计算:(1)1/5根号900+1/2根号121(2)根号12+根号1/27-根号1/3(3)根号1/7+根号28-根号700(4)根号32-3根号1/2+根号8
计算:(1)1/5根号900+1/2根号121(2)根号12+根号1/27-根号1/3(3)根号1/7+根号28-根号700
(4)根号32-3根号1/2+根号8
(1)1/5根号900+1/2根号121
=(1/5)*30+(1/2)*11
=6+5.5
=11.5
(2)根号12+根号1/27-根号1/3(3)根号1/7+根号28-根号700
=2根号3+(根号3)/9-(根号3)/3
=(2+1/9-1/3)*根号3
=16(根号3)/9
(4)根号32-3根号1/2+根号8
=4根号2-3(根号2)/2+2根号2
=9(根号2)/2