计算：①-³√-1+√25-√144+³√64 ②2√3-3√1\3-√8+1\2√12+1\5√50③√8+√72\√2+3√3-√75

计算：①-³√-1+√25-√144+³√64 ②2√3-3√1\3-√8+1\2√12+1\5√50③√8+√72\√2+3√3-√75
计算：①-³√-1+√25-√144+³√64 ②2√3-3√1\3-√8+1\2√12+1\5√50③√8+√72\√2+3√3-√75

计算：①-³√-1+√25-√144+³√64 ②2√3-3√1\3-√8+1\2√12+1\5√50③√8+√72\√2+3√3-√75
①-³√(-1)+√25-√144+³√64
=-(-1)+5-2+4
=1+5-2+4
=8
②2√3-3√(1/3)-√8+1/2√12+1/5√50
=2√3-√(9*1/3)-2√2+1/2*2√3+1/5*5√2
=2√3-√3-2√2+√3+√2
=2√3-√3+√3-2√2+√2
=2√3-√2
③√8+√72/√2+3√3-√75
=2√2+6√2/√2+3√3-5√3
=2√2+6+3√3-5√3
=2√2+6-2√3

1. 1+5-12+4=-2
2. -√2
3 2√2+6-2√3

：①-³√-1+√25-√144+³√64
解:：原式=-1+5-12+4
=-4
②2√3-3√1\3-√8+1\2√12+1\5√50
原式=2√3-√3-2√2+√2+√2
=√3
③√8+√72\√2+3√3-√75
原式=2√2+6+3√3-5√3
=2√2+6-2√3