19.98*37-199.8*1.9+1998*0.82的简便运算
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19.98*37-199.8*1.9+1998*0.82的简便运算19.98*37-199.8*1.9+1998*0.82的简便运算19.98*37-199.8*1.9+1998*0.82的简便运算1
19.98*37-199.8*1.9+1998*0.82的简便运算
19.98*37-199.8*1.9+1998*0.82的简便运算
19.98*37-199.8*1.9+1998*0.82的简便运算
19.98*37-199.8*1.9+1998*0.82
==19.98*37-19.98*19+19.98*82
==19.98*(37-19+82)
==19.98*100
==1998