Решите пример!!! СРОООЧНО!!! (2/15+ 1 7/12)* 30/103- ( 2: 2 1/4)* 9/32
1)2/15 + 1 7/12 = 2/15 + 19/12 =(2 × 4 + 19 × 5)/60 = 8/60 + 95/60 = 103/60 = 1 43/60 2)2 ÷ 2 1/4 = 2 ÷ 9/4 = 2 × 4/9 = 8/9 3)1 43/60 × 30/103 = 103/60 × 30/103 = 1/2 4)8/9 × 9/32 = 1/4=(1 × 2 - 1 × 1)/4 = (2 - 1)/4 = 1/4 ответ: 1/4