简便方法:2.71×6.5+0.21×27.1+2.71
问题描述:
简便方法:2.71×6.5+0.21×27.1+2.71
答
=2.71x6.5+2.1x2.71+2.71x1
=2.71x(6.5+2.1+1)
=2.71x9.6
=26.016