12 7/10*2+2 2/5 решите

Question

12 7/10*2+2 2/5 решите

Answer 1

12*7\10*2+2\5 += 17,2

Comments

= 27 4/5

Answer 2

12 ( 7/10 ) * 2 = ( 127/10 ) * 2 = 127/5 = 25 ( 2/5 )
2) 25 ( 2/5 ) + 2 ( 2/5 ) = 27 ( 4/5 )