19.6/(9.8/0.4)简便计算 6.3/1.8简便计算
问题描述:
19.6/(9.8/0.4)简便计算 6.3/1.8简便计算
答
19.6/(9.8/0.4)
=(19.6/9.8)*0.4
=2*0.4
=0.8
6.3/1.8
=(0.7*9)/(0.2*9)
=0.7/0.2
=7/2
答
19.6/(9.8/0.4)=19.6*0.4/9.8=2*0.4=0.8
6.3/1.8=7*0.9/2*0.9=7/2=3.5