【7.2+2.8=0.9÷0.01=3.5+7.6=3×0.2×0.5=0.96÷0.3=1.5×0.4=7÷0.25=2.5×0.7×0.8=8-2.5=16÷1.6=5.6×1.01=8×（2.5+0.25）=0.36+0.64=64.32÷16=72.8÷0.8=8.4×0.2+1.6×0.2=8.4÷4.2=0.05×0.8=2.56-0.3】

　　7.2+2.8=0.9÷0.01=3.5+7.6=3×0.2×0.5=0.96÷0.3=1.5×0.4=7÷0.25=2.5×0.7×0.8=8-2.5=16÷1.6=5.6×1.01=8×（2.5+0.25）=0.36+0.64=64.32÷16=72.8÷0.8=8.4×0.2+1.6×0.2=8.4÷4.2=0.05×0.8=2.56-0.37=1.25×0.8×0.5=12×2.5=1.23×3=3.2÷1.6=3.5+3.5×3=19.6÷2=8.8÷2.2=3.9+2.03=7.2×0.3+2.8×0.3=13.8+9.9=2.4×2.5=0.75×4=（1.5+0.25）×4=4.2÷0.1=4.2÷3.5=2.14-0.9=27+456+73=12÷0.3=2.87÷0.7=13÷4=24÷4+56÷4=