How do you compute $50-82$ ?

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Answer 1 · 2016-11-04T09:14:38

$-32$

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.

Answer 2 · 2016-11-05T15:58:05

Just for fun this is another approach

$-32$

50 is another way of writing $82-32$

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

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

How do you compute 50-8250-82?