简便计算 (1.9+19%)÷(0.29-190%)

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简便计算(1.9+19%)÷(0.29-190%)简便计算(1.9+19%)÷(0.29-190%)简便计算(1.9+19%)÷(0.29-190%)(1.9+19%)÷(0.29-190%)=(19

简便计算 (1.9+19%)÷(0.29-190%)
简便计算 (1.9+19%)÷(0.29-190%)

简便计算 (1.9+19%)÷(0.29-190%)
(1.9+19%)÷(0.29-190%)
=(190/100+19/100)÷(29/100-190/100)
=209/100*(-100/161)
=-209/161