Respuesta :

9(3+5) is equivalent because factoring a 9 out of both 27 and 45 leaves us with 9(3+5).
altavistard
It may be easier to just do the work until you find a result equal to 27+45.
You must do the work inside parentheses first:

8(3+6) = 8(9) = 72  It just happens that this is equal to 72.

8(19+37) = 8(56)    This is much greater than 72 and is not the correct answer.

And so on.

Otras preguntas