Question

Calculati 1/2+2*(0,25+3) si {8/35+[(3/2-33/35)+(3/14-2/35)-(2-12/7+5/14)]}*3 1/3

Answer 1

 1)1/2+2x(0,25+3)=1/2+2x(25/100+3)=1/2+2x(1/4+3)=1/2+1/2+6=2/2+6=1+6=7   

2) {8/35+[(3/2-33/35)+(3/14-2/35)-(2-12/7+5/14)]}x3 1/3=
={8/35+[(105-66)/70+(15-4)/70-(2/7+5/14)]}x10/3=
={8/35+[39/70+11/70-(4+5)/14)]}x10/3=
={8/35+[50/70-(4+5)/14)]}x10/3=
=[8/35+(5/7-9/14)]x10/3=
=[8/35+(10-9)/14)]x10/3=
=(8/35+1/14)x10/3=
=(16+5)/70x10/3=
=21/70 x10/3=
=3/10x10/3=1