Question

3 2/7 + 5 3/4 = , 9- 12/12 = , 5 - 2 2/5 = . (сколько будет??

Answer 1

3 2/7 + 5 3/4 =23/7+23/4=92/28+161/28=253/28=9 1/28 , 
 9- 12/12 =9-1=8 ,или 9-12/12=8 12/12-12/12=8;
 5 - 2 2/5 =4 5/5-2 2/5=2 3/5

Answer 2

правильно?

Answer 3

да