Question

1-Calcule o valor das expressões:
a)(2/5+3/2) + (5/4 - 2/5) =
b)(7/8 - 5/6) + (8/9 - 7/9)=

Answer 1

a)  (10+1,5) + (1,25-0,4)=11,5+0,85=10,65

Me desculpe,ñ sei a 'b)'
: (