2.19+6.48+0.52-1.38-5.48-0.62(用简便方法计算,
问题描述：
2.19+6.48+0.52-1.38-5.48-0.62(用简便方法计算,
答
2.19+6.48+0.52-1.38-5.48-0.62
=2.19+0.52+6.48-5.48-1.38-0.62
=2.71+（6.48-5.48）-（1.38+0.62）
=2.71+1-2
=1.71