a)
( 7 503 : 61 + 877 ) : 500 + 53 × 11 = 585
= ( 123 + 877 ) : 500 + 583 =
= 1 000 : 500 + 583 =
= 2 + 583 =
= 585
b)
207 × 9 - ( 19² + 3² ) : 74 + 2 296 : 41 = 1 914
= 1 863 - ( 361 + 9 ) : 74 + 56 =
= 1 863 - 370 : 74 + 56 =
= 1 863 - 5 + 56 =
= 1 858 + 56 =
= 1 914
