五年级数学上册简便算法题及答案

10÷3.14-6.86÷3.1437.68÷0.25÷43.75－(2.75－1.3)37.56－(18＋7.56)0.77÷144.5×9.80.7÷0.1250.7÷0.252.5×3.2×12