calculeaza respecand regurile invatate: 8+5×[20+3×(2+4×6)-15]-3=

Răspuns :

8+5x[20+3x(2+4x6)-15]-3=13x(20+3x36-15)-3=13x20+108-15-3=260+93-3=353-3=350
8+5×[20+3×(2+4×6)-15]-3
=8+5×[20+3×(2+24)-15]-3
=8+5×[20+3×26-15]-3
=8+5×[20+78-15]-3
=8+5×[98-15]-3
=8+5×83-3
=8+415-3
=423-3
=420