a) { [ 1 200 x ( 8 - 200 : 25 ) + 36 ] - 3 096 : 387 } : 2² = 7
= { [ 1 200 x ( 8 - 8 ) + 36 ] - 8 } : 4 =
= [ ( 1 200 x 0 + 36 ) - 8 ] : 4 =
= ( 36 - 8 ) : 4 =
= 28 : 4 =
= 7
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b)
13² + 5 × { 2 316 : 579 + [ 40 + 2³ x ( 2⁴x 5² : 10 - 2² x 3² ) ] x 5 } + 11
= 169 + 5 x { 4 + [ 40 + 8 x ( 20² : 10 - 6² ) ] x 5 } + 11 =
= 169 + 5 x { 4 + [ 40 + 8 x ( 40 - 36 ) ] x 5 } + 11 =
= 169 + 5 x [ 4 + ( 40 + 8 x 4 ) x 5 ] + 11 =
= 169 + 5 x ( 4 + 72 x 5 ) + 11 =
= 169 + 5 x ( 4 + 360 ) + 11 =
= 169 + 5 x 364 + 11 =
= 169 + 1 820 + 11 =
= 2 000
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c)
2 x [ 3³ x 2⁴ : 3 : ( 148 : 37 + 12 ) ] - 882 : 49 = 0
= 2 x [ 9 x 16 : ( 4 + 12 ) ] - 18 =
= 2 x 9 - 18 =
= 18 - 18 =
= 0