原式=√(1/2) +√12.5 -(1/2)√200 +√60又1/2
=√(2/4) +√(25×1/2) -(1/2)×√100×√2 +√(121/2)
=√2×√(1/4)+√25×√(1/2) -(1/2)×10×√2+√121×√(1/2)
=√2×1/2 +5×√2×1/2 -5√2 +11×√2×1/2
=(√2)/2 +(5√2)/2 -5√2 +(11√2)/2
=(√2+5√2-10√2+11√2)/2
=(7√2)/2