What did Áurea, Émerson, and Glauce do when performing calculations involving numerical expressions? They used the equal sign (=) to indicate the ...

What did Áurea, Émerson, and Glauce do when performing calculations involving numerical expressions?

They used the equal sign (=) to indicate the result of additions, subtractions, multiplications, and divisions.
They used the plus sign (+) to indicate the result of additions, subtractions, multiplications, and divisions.
They used the minus sign (-) to indicate the result of additions, subtractions, multiplications, and divisions.
They used the multiplication sign (x) to indicate the result of additions, subtractions, multiplications, and divisions.