用简便方法计算:2.6×7.4+0.26×25+0.026×10=____________________________________.
问题描述:
用简便方法计算:2.6×7.4+0.26×25+0.026×10=____________________________________.
答
2.6×7.4+0.26×25+0.026×10
=0.26×74+0.26×25+0.26×1
=0.26×(74+25+1)
=0.26×100
=26