1.5 7/20·4.5+8.9·4 1/2=(5,35+8,9)·4,5=14,25·4,5=64,125 2.64,125:3,35=17,1 3.17,1·7/9=13,3 4.1 11/15+13,3=1 11/15+ 13 3/10= 14 (11·2+3·3)/30=14 31/30=15 1/30
Решите задачу: