Question

4 supra 9 : 2 supra 3+8 supra5:4supra3

Answer 1

4 supra 9 × 3 supra 2 + 8 supra 5 × 3 supra 4=
2 supra 3+6 supra 5=
Apoi amplifici prima 5 si al doilea cu 3
10 supra 15+18 supra 15= 28 supra 15

Answer 2

4/9 : 2/3 + 8/5 : 4/3 =
=> 2/3 + 8/5 x 3/4 =
=> 2/3 + 2/5 x 3=
=> 2/3 + 6/5 =
=> 10/15 18/15 =
=> 28/15