How do you simplify #25 + "-"45#?

1 Answer
Jun 12, 2016

Answer:

#25+(-45)=color(green)(-20)#

Explanation:

In general #a+(-b)# is the same as #a-b#

So #25+(-45)# is the same as #25-45#

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If you have difficulty subtracting a larger number from a smaller number:

Remember, in general #(a-b)# is the same as #-(b-a)#

So
#color(white)("XXX")25-45=-(45-25)=-(20)#