简便计算:(+0.02)+(-3.4)+(-0.6)+(+1.98)
问题描述:
简便计算:(+0.02)+(-3.4)+(-0.6)+(+1.98)
答
式子变化得:【(+0.02)+1.98】+【(-3.4)+(-0.6)】=2+(-4)=-2
简便计算:(+0.02)+(-3.4)+(-0.6)+(+1.98)
式子变化得:【(+0.02)+1.98】+【(-3.4)+(-0.6)】=2+(-4)=-2