计算abc-[2ab-(3abc-ab)+4abc]=?
问题描述:
计算abc-[2ab-(3abc-ab)+4abc]=?
答
原式=abc-[2ab-(3abc-ab)+4abc]
=abc-(2ab-3abc+ab+4abc)
=abc-2ab+3abc-ab-4abc
=(abc+3abc-4abc)+(-2ab-ab)
=0+(-3ab)
= -3ab谢谢~~我也是这么写的~~