2.19+6.48+27.81-1.38-5.48-0.62算试
问题描述:
2.19+6.48+27.81-1.38-5.48-0.62算试
答
(2.19+27.81)-(1.38+0.65)+6.48-5.48
=30-2+6.48-5.48
=28+1
=29