1.01+0.101= 4.3×0.001= 7.2+104= 2.45+2.65= 5×2.4=
1÷1.25= 1÷0.01﹣1×0.01= 10.5﹣3.5÷0.7= 7.2+2.8÷0.4= 3.74÷2.5≈(得数四舍五入精确到百分位)