23.8-4.96+6.2-5.05【简算,

问题描述:

23.8-4.96+6.2-5.05【简算,

23.8-4.96+6.2-5.05=(23.8+6.2)-(4.96+5.05)=40-10.01=40-10-0.01=30-0.01=29.99