用简便方法计算:7.74×(2.8-1.3)+1.5×2.26.
问题描述:
用简便方法计算:7.74×(2.8-1.3)+1.5×2.26.
答
7.74×(2.8-1.3)+1.5×2.26
=7.74×1.5+1.5×2.26
=(7.74+2.26)×1.5
=10×1.5
=15.