2.6+1.4×3 (8+0.8)×12.5
80×3.9×1.25 15.2×9.9+1.52
3.9×8.6+3.9×1.4 4.8×3.5-10.9
93.6×0.25×4
0.6×99+0.6
7.2+5.76+2.8