简便计算(拖式) 4.3+10.5+0.7 20.6-6.64-3.36
问题描述:
简便计算(拖式) 4.3+10.5+0.7 20.6-6.64-3.36
答
4.3+10.5+0.7 =4.3+0.7+10.5 =5+10.5 =15.5 20.6-6.64-3.36 =20.6-(6.64+3.36) =20.6-10 =10.6
简便计算(拖式) 4.3+10.5+0.7 20.6-6.64-3.36
4.3+10.5+0.7 =4.3+0.7+10.5 =5+10.5 =15.5 20.6-6.64-3.36 =20.6-(6.64+3.36) =20.6-10 =10.6