大师作文网46/91*46/91+45/91*45/91-46/91*45/91-45/91*44/91怎样简算
来源：学生作业帮 编辑：大师作文网作业帮 分类：数学作业 时间：2024/10/01 06:11:47
46/91*46/91+45/91*45/91-46/91*45/91-45/91*44/91怎样简算
46/91*46/91+45/91*45/91-46/91*45/91-45/91*44/91
＝（46/91）^2+(45/91)^2-46/91*45/91+46/91*45/91-46/91*45/91-45/91*44/91
=(46/91-45/91)^2+46/91*45/91-45/91*44/91
=(1/91)^2+[45*(46-44)]/91*91
=1/91*91+90/91*91
=91/91*91
=1/91
＝（46/91）^2+(45/91)^2-46/91*45/91+46/91*45/91-46/91*45/91-45/91*44/91
=(46/91-45/91)^2+46/91*45/91-45/91*44/91
=(1/91)^2+[45*(46-44)]/91*91
=1/91*91+90/91*91
=91/91*91
=1/91