Question

[5 3/7:4-2/7]:5+3 3/4

Answer 1

1. 5 3/7:4/1=38/7*1/4=19/14
2.19/14-2/7=19/14-2*2/14=19/14-4/14=15/14
3. 15/14:5/1=15/14*1/5 (15 и 5 сокращаем на 3)=3/14
4. 3/14+3 3/4=3*2/28+3 3*7/28=9/28+3 21/28=3 27/28