Question

a. (−3) × (−5) + 5 − (−1) =

Answer 1

(−3) × (−5) + 5 − (−1) = 21

(−3) × (−5) = 15

5 − (−1) = 6

15 + 6 = 21

Answer 2

Respuesta:

regla signos

+ . + = +

- . - = +

- . + = -

+ . - = -

Explicación paso a paso:

(−3) × (−5) + 5 − (−1)  = 21

Multiplicar y dividir:

(−3) × (−5)

= 15 + 5 - (-1)

Sumar y restar:

20 - (-1)

= 20 + 1

= 21