(80 − 7) + 13 = 86
52 − (6 + 18) = 28
(60 + 8) − 19 = 49
40 − (21 − 7) = 26
Вычисления:
(80 − 7) + 13 = 73 + 13 = 86
$\snippet{name: op_column, sign: '-', x: '80', y: '7', z: '73'}$
$\snippet{name: op_column, sign: '+', x: '73', y: '13', z: '86'}$
52 − (6 + 18) = 52 − 24 = 28
$\snippet{name: op_column, sign: '+', x: '6', y: '18', z: '24'}$
$\snippet{name: op_column, sign: '-', x: '52', y: '24', z: '28'}$
(60 + 8) − 19 = 68 − 19 = 49
$\snippet{name: op_column, sign: '+', x: '60', y: '8', z: '68'}$
$\snippet{name: op_column, sign: '-', x: '68', y: '19', z: '49'}$
40 − (21 − 7) = 40 − 14 = 26
$\snippet{name: op_column, sign: '-', x: '21', y: '7', z: '14'}$
$\snippet{name: op_column, sign: '-', x: '40', y: '14', z: '26'}$