Efectuati: [21-(17×6-816:8)×3]:7

Cine ma ajuta varog repede coronita la toti


Răspuns :

[21-(102-102)×3]÷7=
(21-0×3)÷7=21:7=3

[ 21 - ( 17 × 6 - 816 : 8 ) × 3 ] : 7 = 3

= [ 21 - ( 102 - 102 ) x 3 ] : 7 =

= ( 21 - 0 x 3 ) : 7 =

= 21 : 7 =

= 3