Respuesta :

a) -9+18= 9 degrees ferhinhite
b) 67-(-25)= 92 degrees more

a) the temperature was -9 and now its 18

18 - -9 = 27

so it has risen 27 degrees.

if its easier add the 9 so it become 0 degrees than add the 18

so you end up with 9 + 18 = 27


b) -25 and 67

add 25 to get it to 0 degrees and now we only have to add 67 so it become a lot easier.

so 25 + 67 = 92