1)-2^2+√5^2-3^2
=-4+5-9
=-8
(2) -√0.16乘√1又9/16+√13^2-12^2乘√1又1/4乘√1/5
=-0.4x5/4+ √25x√5/4x√1/5
=-0.5+√25x5/4x1/5
=-0.5+5/2
=2
如果本题有什么不明白可以追问,
1)-2^2+√5^2-3^2
=-4+5-9
=-8
(2) -√0.16乘√1又9/16+√13^2-12^2乘√1又1/4乘√1/5
=-0.4x5/4+ √25x√5/4x√1/5
=-0.5+√25x5/4x1/5
=-0.5+5/2
=2
如果本题有什么不明白可以追问,