简便运算;0.12+0.23+0.34+……+0.89=

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简便运算;0.12+0.23+0.34+……+0.89=
简便运算;0.12+0.23+0.34+……+0.89=

简便运算;0.12+0.23+0.34+……+0.89=
解0.12+0.78+0.23+0.67+0.34+0.56+0.89+0.45=4.04

简便运算;0.12+0.23+0.34+……+0.89= 简便运算 (1+0.12+0.23)x(0.12+0.23+0.34)-(1+0.12+0.23+0.34)x(0.12+0.23) 简便运算（1+0.12+0.23）X(0.12+0.23+0.34) - (1+0.12+0.34)X(0.12+0.23) 1.2×9.9+0.12简便运算简便运算简便运算简便运算简便运算, 简便运算简便运算简便运算. 简便运算. 简便运算, 简便运算简便运算简便运算. 简便运算, 简便运算,