2 2/3= (2*3+2)/3= 8/3
2 1/7= (2*7+1)/7=15/7
[9-(8/3)*)15/7)]*(21/46)=
(9-40/7)*(21/46)=
[(63-40)7]*(21/46)=
(23/7)*(21/46)= 3/2
Răspuns:
Explicație pas cu pas:
(9-8/3·15/7)·21/46=(9-40/7)·21/46=(9·7-40)/7·21/2·23=(63-40)×3/2·23=
=23·3/2·23=3/2
