17.56-4.3+5.7=用简便方法计算?
问题描述:
17.56-4.3+5.7=用简便方法计算?
答
17.56-4.3+5.7=17.56-4.3+4.3+1.4=17.56+1.4=18.96
17.56-4.3+5.7=用简便方法计算?
17.56-4.3+5.7=17.56-4.3+4.3+1.4=17.56+1.4=18.96