简便计算:56/(5.6*4)第一道;8.4/9+1.6/4第二道;4.68-(1.68-0.32)第三道;7.3/4+2.7*0.25第四道
问题描述:
简便计算:56/(5.6*4)第一道;8.4/9+1.6/4第二道;4.68-(1.68-0.32)第三道;7.3/4+2.7*0.25第四道
要算式~写的对的~+赏5~第二道抄错了~8.4/6+1.6/4
答
56/(5.6*4)=(56*10)/(5.6*4*10)=(56*10)/(56*4)=10/4=2.58.4/9+1.6/4=8.4/9+0.4/1=8.4/9+3.6/9=12/9=4/34.68-(1.68-0.32)=4.68-1.68+0.32=3+0.32=3.327.3/4+2.7*0.25=7.3/4+2.7*1/4=7.3/4+2.7/4=10/4=2.5....怎么觉得有些题答案好像不对~哪一个8.4/6+1.6/4=1.4+0.4=1.8