4又2分之1乘以[-3^2乘以(-3分之一)^2+0.8]除以(-5分之3)× ÷
=9/2×[-9×(-1/3)^2+0.8]÷(-3/5)
=9/2×[-9×(1/9)+4/5]÷(-3/5)
=9/2×[-1+4/5]×(-5/3)
=9/2×[-1/5]×(-5/3)
=9/2×1/3
=3/2(2分之3)
4又2分之1乘以[-3^2乘以(-3分之一)^2+0.8]除以(-5分之3)× ÷
=9/2×[-9×(-1/3)^2+0.8]÷(-3/5)
=9/2×[-9×(1/9)+4/5]÷(-3/5)
=9/2×[-1+4/5]×(-5/3)
=9/2×[-1/5]×(-5/3)
=9/2×1/3
=3/2(2分之3)