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[(808:4+140:4)x3-15x3+17x10]:2+9


Răspuns :

[(808:4 +140:4 )×3 -15 × 3 +17 ×10 ] : 2 +9
[( 202 +35 )×3 -45 +170 ] : 2 +9
( 237 ×3 -45 +170 ) :2 +9
(711 -45 +170 ):2 +9
(666 +170 ) : 2 +9
836 :2 +9
418 +9
427
[ ( 808 : 4 + 140 : 4) x 3 -15 x 3 + 17 x 10] : 2 + 9 = 427 
= [ ( 202 + 35 ) x 3 - 45 + 170 ] : 2 + 9 =
= ( 237 x 3 - 45 + 170 ) : 2 + 9 = 
= (  711 - 45 + 170) : 2 + 9 =
= ( 666 + 170 ) : 2 + 9 
= 836 : 2 + 9 = 
= 418 + 9 =
= 427