Π’ΠΈΠΌΠΎΡΠ΅Π΅Π²Π°8 Π»Π΅Ρ Π½Π°Π·Π°Π΄
Π‘Π½Π°ΡΠ°Π»Π° Π²ΡΠΏΠΎΠ»Π½ΠΈΠΌ Π΄Π΅ΠΉΡΡΠ²ΠΈΡ Π² ΡΠΊΠΎΠ±ΠΊΠ°Ρ , Π° ΠΏΠΎΡΠΎΠΌ ΠΏΡΠΈΠ±Π°Π²ΠΈΠΌ ΠΏΠΎΠ»ΡΡΠΈΠ²ΡΠΈΠ΅ΡΡ Π·Π½Π°ΡΠ΅Π½ΠΈΡ:
(7 4/19 - 2 8/19) + (8 - 4 12/19) = 8 3/19;
1) 7 4/19 - 2 8/19 = 7 - 2 + 4/19 - 8/19 = 5 + (4 - 8)/19 = 5 - 4/19 = 4 + 1 - 4/19 = 4 + 19/19 - 4/19 = 4 + (19 - 4)/19 = 4 + 15/19 = 4 15/19;
2) 8 - 4 12/19 = 8 - 4 - 12/19 = 4 - 12/19 = 3 + 1 - 12/19 = 3 + 19/19 - 12/19 = 3 + (19 - 12)/19 = 3 + 7/19 = 3 7/19;
3) 4 15/19 + 3 7/19 = 4 + 3 + 15/19 + 7/19 = 7 + (15 + 7)/19 = 7 + 22/19 = 7 + 1 (22 - 19)/19 = 7 + 1 3/19 = 7 + 1 + 3/19 = 8 + 3/19 = 8 3/19.