(39 − 17) + 20 = 42
59 − (32 + 13) = 14
(67 + 12) − 55 = 24
23 + (97 − 86) = 34
(90 − 50) − 10 = 30
10 + (20 + 45) = 75
Вычисления:
(39 − 17) + 20 = 22 + 20 = 42
$\snippet{name: op_column, sign: '-', x: '39', y: '17', z: '22'}$
$\snippet{name: op_column, sign: '+', x: '22', y: '20', z: '42'}$
59 − (32 + 13) = 59 − 45 = 14
$\snippet{name: op_column, sign: '+', x: '32', y: '13', z: '45'}$
$\snippet{name: op_column, sign: '-', x: '59', y: '45', z: '14'}$
(67 + 12) − 55 = 79 − 55 = 24
$\snippet{name: op_column, sign: '+', x: '67', y: '12', z: '79'}$
$\snippet{name: op_column, sign: '-', x: '79', y: '55', z: '24'}$
23 + (97 − 86) = 23 + 11 = 34
$\snippet{name: op_column, sign: '-', x: '97', y: '86', z: '11'}$
$\snippet{name: op_column, sign: '+', x: '23', y: '11', z: '34'}$
(90 − 50) − 10 = 40 − 10 = 30
$\snippet{name: op_column, sign: '-', x: '90', y: '50', z: '40'}$
$\snippet{name: op_column, sign: '-', x: '40', y: '10', z: '30'}$
10 + (20 + 45) = 10 + 65 = 75
$\snippet{name: op_column, sign: '+', x: '20', y: '45', z: '65'}$
$\snippet{name: op_column, sign: '+', x: '10', y: '65', z: '75'}$