65-43+135-57怎么简便计算
问题描述:
65-43+135-57怎么简便计算
答
(65+135)-(43+57)
答
65-43+135-57
=65+135-(43+57)
=200-100
=100
答
(135+65)—(43+57)=200—100=100
答
65-43+135-57
=65+135-(43+57)
=200-100
=100
答
原式=(135+65)-(57+43)
=200-100
=100