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calculeaza, respectand ordinea efectuarii operatiilor:830-(820÷4÷5+59)×8=

Răspuns :

1.820:4=205
2.205:5=41
3.41+59=100
4.100x8=800
5.830-800=30
830-(205:5+59)·8= 830-(41+59)·8= 830-100·8= 830-800= 30