4a^2\(-a\2b)×(-b\8a)是4a^2÷(-a2b)×(-b\8a)

问题描述:

4a^2\(-a\2b)×(-b\8a)
是4a^2÷(-a2b)×(-b\8a)

4a^2÷(-a^2b)×(-b\8a)
=4a^2 ×(-1/a^2b)×(-b/8a)
=1/2a