19.6/(9.8/0.4)简便计算 6.3/1.8简便计算

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19.6/(9.8/0.4)简便计算6.3/1.8简便计算19.6/(9.8/0.4)简便计算6.3/1.8简便计算19.6/(9.8/0.4)简便计算6.3/1.8简便计算19.6/(9.8/0.4

19.6/(9.8/0.4)简便计算 6.3/1.8简便计算
19.6/(9.8/0.4)简便计算 6.3/1.8简便计算

19.6/(9.8/0.4)简便计算 6.3/1.8简便计算
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

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