四则混合运算和解方程练习-复习时用(共4页).doc

精选优质文档-倾情为你奉上四则混合运算和解方程练习4-（2.5+1.9）(0.5-0.5) 4-2.5+1.9(0.5-0.5) 4-2.5+1.90.5-0.5 4-(2.5+1.90.5)-0.54-(2.5+1.9) (0.5-0.5) 4-(2.5+1.9) 0.5-0.512-4-2-5-12.5% 0.125+8.25+12.5%(+) 2.50.4215-2.25-7 +(-)10(-0.5) (2.7-4.25)2.81.25+17.4+125% 10-4.687.2+0.05 1(5-