Вправи 1801 - 1950 » 1921



Виконай дії: а) 1/7 + 3/7 = 4/7; б) 8/9 – 8/9 = 0; в) 11/15 + 7/15 + 1/15 = 19/15 = 14/15; г) 7/8 – 2/8 + 3/8 = 8/8 = 1; ґ) 23/4 – 11/4 = 2 – 1 + 3/4 – 1/4 = 12/4 = 11/2; д) 5 – 5/6 = 4 + 6/6 – 5/6 = 41/6.



Вправи 1801 - 1950