 anna1877 
                                                18.12.2020 11:34
                                                
                                                anna1877 
                                                18.12.2020 11:34
                                             cerkasovae50 
                                                18.12.2020 11:34
                                                
                                                cerkasovae50 
                                                18.12.2020 11:34
                                             MihailoMK 
                                                18.12.2020 11:34
                                                
                                                MihailoMK 
                                                18.12.2020 11:34
                                             nadezhdalipchan 
                                                18.12.2020 11:35
                                                
                                                nadezhdalipchan 
                                                18.12.2020 11:35
                                             Natashazzz 
                                                18.12.2020 11:35
                                                
                                                Natashazzz 
                                                18.12.2020 11:35
                                             lubka2105 
                                                18.12.2020 11:36
                                                
                                                lubka2105 
                                                18.12.2020 11:36
                                             olgaluppo 
                                                18.12.2020 11:36
                                                
                                                olgaluppo 
                                                18.12.2020 11:36
                                             Дима22222222 
                                                18.12.2020 11:36
                                                
                                                Дима22222222 
                                                18.12.2020 11:36
                                            
1) 4 11/18 * 6 / 7 =83/18*6/7=83/3*1/7=83/21
2) 83/21-14/9=249/63-98/63=151/63