(18 × 8 + 56 ) : [ 50 × 40 : ( 220 - 2 × 60 ) ] = 10
= ( 144 + 56 ) : [ 2 000 : ( 220 - 120 ) ] =
= 200 : ( 2 000 : 100 ) =
= 200 : 20 =
= 10
2)
A)
( 580 - 40 : 2 × 4 ) : 25 + 550 < 600 (Adevarat)
( 580 - 20 x 4) : 25 + 550 =
= 500 : 25 + 550 =
= 20 + 550 =
= 570 < 600
B)
300 - 2 × [70 - (78 : 3 ) ] : 8 > 250 (Adevarat)
300 - 2 × ( 70 - 26) : 8 =
= 300 - 2 × 44 : 8 =
= 300 - 88 : 8 =
= 300 - 11 =
= 289 > 250
C)
[( 3 + 47 + 50 ) : 4 + 91 ] : 2 > 59 ( Fals)
= ( 100 : 4 + 91) : 2 =
= ( 25 + 91 ) : 2 =
= 116 : 2 =
= 58 < 59
D)
[100 × ( 25 + 50 × 4 ) + 500 ) ] :10 < 3 000 (Adevarat)
= ( 100 × 225 + 500 ) : 10 =
= ( 22 500 + 500 ) : 10 =
= 23 000 : 10 =
= 2 300 < 3 000