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15+5x {20-5:[2-15:(18-15:5)]x4+15}+15-​

Răspuns :

Răspuns:

15+5×{20-5:[2-15:(18-15:5)]×4+15}+15=

15+5×{20-5:[2-15:(18-3)]×4+15}+15=

15+5×[20-5:(2-15:15)×4+15]+15=

15+5×[20-5:(2-1)×4+15]+15=

15+5×(20-5:1×4+15)+15=

15+5×(20-5×4+15)+15=

15+5×(20-20+15)+15=

15+5×(0+15)+15=

15+5×15+15=

15+75+15=

90+15=105