Răspuns :
Explicație pas cu pas:
277+5×{28:7+5×[30+9×(200:5-84:4)]}
277+5×{28:7+5×[30+9×(40-21)]}
277+5×{28:7+5×[30+9×19]}
277+5×[28:7+5×[30 +171]}
277+5×28:7+5×201
277+140:7+1005
277+20+1005
277+1025=1302
Explicație pas cu pas:
277+5×{28:7+5×[30+9×(200:5-84:4)]}
277+5×{28:7+5×[30+9×(40-21)]}
277+5×{28:7+5×[30+9×19]}
277+5×[28:7+5×[30 +171]}
277+5×28:7+5×201
277+140:7+1005
277+20+1005
277+1025=1302