Question

вычислить 
(3/10+7/10)3/4
2/34/15
4/9(7/9-2/9)

Answer 1

( 3/10+ 7/10 ) 3/4 = 0.75
3/10 = 0.3
7/10 = 0.7
0.3 + 0.7 = 1 * на 3/4, а это 0.75 и получаем 1 * 0.75 = 0.75