How do you compute #50-82#?

2 Answers
Nov 4, 2016

Answer:

#-32#

Explanation:

use the relationship

#a-b=-(b-a)#

#50-82=-(82-50)#

#=-32#

In other words if the first number #># the second number .

Subtract the other way round and put a #-# in front of the answer.

Nov 5, 2016

Answer:

Just for fun this is another approach

#-32#

Explanation:

50 is another way of writing #82-32#

So instead of writing 50 write #82-32# giving

#color(blue)(color(magenta)(50) -82" "->" "color(magenta)(cancel(82)-32)-cancel(82))" "=-32#