Find the difference:
| \(\displaystyle -\) | \(\displaystyle 7\) | \(\displaystyle 0\) |
| \(\displaystyle 6\) | \(\displaystyle 8\) | |
Step One.
From the ones of the number \(\displaystyle 70\) (this is the digit \(\displaystyle 0\)), subtract the ones of the number \(\displaystyle 68\) (this is the digit \(\displaystyle 8\)):
\(\displaystyle 0-8{\small . }\)
But \(\displaystyle 0\) is less than \(\displaystyle 8,\) so we borrow one ten from the number \(\displaystyle 70\) and subtract:
\(\displaystyle 10+0-8=10-8=2{\small . }\)
| -1 | ||
| \(\displaystyle -\) | \(\displaystyle 7\) | \(\displaystyle \color{red}{ 0}\) |
| \(\displaystyle 6\) | \(\displaystyle \color{red}{ 8}\) | |
| \(\displaystyle ?\) | \(\displaystyle \color{red}{ 2}\) |
Step Two.
From the tens of the number \(\displaystyle 70\) (this is the digit \(\displaystyle 7\)) subtract the tens of the number \(\displaystyle 68\) (this is the digit \(\displaystyle 6\)), taking into account that we borrowed one ten in the previous step:
\(\displaystyle (7-1)-6=0{\small . }\)
| \(\displaystyle -\) | \(\displaystyle 7\) | \(\displaystyle 0\) |
| \(\displaystyle 6\) | \(\displaystyle 8\) | |
| \(\displaystyle \color{red}{ 0}\) | \(\displaystyle 2\) |
Answer: \(\displaystyle 2{\small . }\)