2÷(1/4)+(-8)=8-8=0
解:2÷(-1/2)² +(-2)³ =2÷ 1/4-8=2×4-8=8-8=0
(-1/2)2=1/4(-2)3=-8所以2÷1/4-8=0
2÷(-1/2)² +(-2)³ =2÷1/4+(-8)=8-8=0