Question

4. Fill in the blanks:
(1) (-13) + ( )= (-15) +​

Answer 1

$( - 13) + () = ( - 15) + () \\ \\ - 13 + ( - 2) = - 15 + 0 \\ \\ - 15 = - 15$

Answer 2

$\huge\pink{\boxed{\mathfrak{Hello}}}$

$= ( - 13) + ( - 2) = ( - 15) \\ = - 13 - 2 = ( - 15) \\ = - 15 = - 15$