3.27+6.4+2.73+3.6 1.63+1.89-1.89+0.11 8.7+1.3×26
8.7÷0.2÷0.5 4.8×56.7+0.567×520
7.6×1.9﹣96.2÷7.4
2.54×10.1﹣0.254
2.5×7.9×0.4
3.79÷0.125÷0.8
72.8÷5.6+14.9 1.35×2.5+2.65×2.5 1.4÷0.8÷12.5