Вычисли.
68 + 7
52 − 5
$\snippet{name: op_column, sign: '+', x: '43', y: '14', z: ''}$
$\snippet{name: op_column, sign: '-', x: '98', y: '37', z: ''}$

68 + 7 = 68 + 2 + 5 = 70 + 5 = 75
52 − 5 = 52 − 2 − 3 = 50 − 3 = 47
$\snippet{name: op_column, sign: '+', x: '43', y: '14', z: '57'}$
$\snippet{name: op_column, sign: '-', x: '98', y: '37', z: '61'}$