Contact us
Choose a category below so we can get back to you as quickly as possible.
原式 =(3分之1-6分之5+9分之7)×(-18) =-(3分之1×18-6分之5×18+9分之7×18) =-(6-15+14) =-5
1/9
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.