奥数计算题:(0.37+0.29+2)×﹙0.37+0.29+0.17﹚-﹙2+0.37+0.29+0.17﹚×﹙0.37+0.2﹚
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/18 07:35:28
![奥数计算题:(0.37+0.29+2)×﹙0.37+0.29+0.17﹚-﹙2+0.37+0.29+0.17﹚×﹙0.37+0.2﹚](/uploads/image/z/112050-18-0.jpg?t=%E5%A5%A5%E6%95%B0%E8%AE%A1%E7%AE%97%E9%A2%98%EF%BC%9A%EF%BC%880.37%2B0.29%2B2%EF%BC%89%C3%97%EF%B9%990.37%EF%BC%8B0.29%EF%BC%8B0.17%EF%B9%9A%EF%BC%8D%EF%B9%992%EF%BC%8B0.37%EF%BC%8B0.29%EF%BC%8B0.17%EF%B9%9A%C3%97%EF%B9%990.37%EF%BC%8B0.2%EF%B9%9A)
x){t鳩^[|f3=csm=#Km{:Os&Hn 24(e"(bTOo+lğ4fËuDm!1i{3Ɏ]`aDm#M 2RSWHʄhMTS64U$Mtu` ZcڋV03Z%Fh FXQ V!9
t@NFb.AH/.H̳&0 ŖD]a8tr@u
p
奥数计算题:(0.37+0.29+2)×﹙0.37+0.29+0.17﹚-﹙2+0.37+0.29+0.17﹚×﹙0.37+0.2﹚
奥数计算题:(0.37+0.29+2)×﹙0.37+0.29+0.17﹚-﹙2+0.37+0.29+0.17﹚×﹙0.37+0.2﹚
奥数计算题:(0.37+0.29+2)×﹙0.37+0.29+0.17﹚-﹙2+0.37+0.29+0.17﹚×﹙0.37+0.2﹚
(0.37+0.29+2)×﹙0.37+0.29+0.17﹚-﹙2+0.37+0.29+0.17﹚×﹙0.37+0.29﹚
设0.37+0.29=a
则原式可化为
(a+2)(a+0.17)-(2+a+0.17)a
=a²+0.17a+2a+0.34-2a-a²-0.17a
=0.34
或者
[(0.37+0.29)+2][(0.37+0.29)+0.17]-[2+(0.37+0.29)+0.17](0.37+0.29)
=(0.37+0.29)²+0.17(0.37+0.29)+2(0.37+0.29)+0.34-2(0.37+0.29)-(0.37+0.29)²-0.17(0.37+0.29)
=0.34
(0.37+0.29+2)×﹙0.37+0.29+0.17﹚-﹙2+0.37+0.29+0.17﹚×﹙0.37+0.2﹚
=
(0.37+0.29+2)×﹙0.37+0.29+0.17﹚-﹙2﹚×﹙0.37+0.2﹚-
﹙0.37+0.29+0.17﹚×﹙0.37+0.2﹚
=2.09*(0.83)-1.14