Question

2 x 10+10:{30+2x102 : [70-48 x 10: (9x10 - 40:4)]}

Va rog fain

Answer 1

=2×10+10×{30+2×102:[70-48•10:(90-10)]}

=2×10+10×[30+2×102:(70-48×10:80)]

=2×10+10×[30+2×102:(70-6)]

=20+10×(30+204:64)

=20+10•$(30 + \frac{51}{16})$

=20+10×$\frac{531}{16}$

=20+$\frac{2655}{8}$

=$\frac{2815}{8}$