28.4-6.35-3.65+12.6怎样简便运算?
问题描述:
28.4-6.35-3.65+12.6怎样简便运算?
答
28.4+12.6-3.65-6.35
答
28.4减(6.35十3.65)加12.6
答
(28.4+12.6)-(6.35+3.65)=31
答
(28.4+12.6)-(6.35+3.65)
答
=(28.4+12.6)-(6.35+3.65)
=41-10
=31