calculeaza 131+54 ×9-5×(303:3+252:12)=

Răspuns :

131 + 54 × 9 - 5 × ( 303 : 3 + 252 : 12 ) =
131 + 54 × 9 - 5 × ( 101 + 252 : 12 )=
131 + 54 × 9 - 5 × ( 101 + 21 )
131 + 54 × 9 - 5 × 122 =
131 + 486 - 5 × 122 =
131 + 486 - 610 =
617 - 610 =
7