Question

Calculati : a ) ( 13 supra 12 - 11 supra 18 ) : 17 supra 9 + 2 = ? b) 2- ( 49 supra 45 - 7 supra 15 ) : 14 supra 20 = ? c) (13 supra 12 -4 supra 15 ) : 49 supra 30 + 1 supra3 = ?

Answer 1

1)13/12-11/18÷17/9+2=17/36÷17/11=17/36×11/17=1/36×11=11/36=0,305

2)2-(49/45-7/15)÷14/20=2-28/45×20/14=2-2/9×4=2-8/9=10/9=11/9,1,1