Question

Calculati a) 1 supra 15 + -5 supra 6 +1 supra 9 b) 11 supra 8 + 2 1 supra 3 - ( 1 3 supra 8 + 7 supra ) c 0, 2 + ( 13 sipra 4 - 3 1 supra 4 ) + (-1,2)

Answer 1

a) 1/15 + -5/6 +1/9=(1*6-5*15+1*10)/90=(6-75+10)/90=-59/90

b) 11/8 + 2 1/3 - ( 1 3 / 8 + 7/3 ) =11/8 + 7/3 - ( 11 / 8 + 7/3 ) =
=11/8 + 7/3 - 11 / 8- 7/3 =0

c)  0, 2 + ( 13/ 4 - 3 1/ 4 ) + (-1,2)= 0,2 +  13/ 4 - 13/ 4-1,2=-1