Contact us
Choose a category below so we can get back to you as quickly as possible.
1+2+3+.9=45 45-10=35 35/2=17.5 九個數的和是45,與10相差35,即只要把和是17.5的數前面的+改成-號即可.但是,因為所有的數都是整數,不可能有和是17.5的數,所以,此題是無法做的.
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.