问题 解答题 直接写出得数:3.04+2.6=______;568-199=______;0.65÷1.3=______;4×12÷4×12=______;720÷1415=______;512×310=______;715-110=______;72×(18-19)=______. 答案 3.04+2.6=5.64;568-199=369;0.65÷1.3=0.5;4×12÷4×12=14;720÷1415=38;512×310=18;715-110=1130;72×(18-19)=1.故答案为:5.64,369,0.5,14,38,18,1130,1.