1) 1(целая) 7/15- 4/25 2) 6(целой) 3/4* 1( целая) 7/9 3) 3(целая) 1/5: 2( целая ) 2/5
1+7/15-3/25 = 22/15-3/25 (находим общие знаменатили (75)) 110/75-9/75 = 101/75 = 1(целая) 26/75 (6+3/4)*(1+7/9) = 27/4*16/9 = 12 (3+1/5) / (2+2/5) = 16/5 / 12/5 = 16/5 * 5/12 = 4/3 = 1(целая) 1/3
Решите задачу: