Add:
c | ||
+ | c | |
c |
Correct answer:
Add:
c | ||
+ | c | |
c |
Your incorrect answer is:
c | ||
+ | c | |
c |
Please note
: When adding use the skill you've learned before: with/without re-grouping.
When subtracting use the technique you've learned with/without re-grouping where applicable.