Worked examples
Two examples
Example 1
Name the case: 5 − 3
- The dash between the numbers is the operation: subtracting.
- The 3 has no sign of its own, so it is positive.
Answer: Subtract a positive
Example 2
Name the case: −5 − (−3)
- The dash at the very start belongs to the 5. The dash between the numbers means subtracting.
- The second number, in parentheses, is negative 3.
Answer: Subtract a negative
Where this is taught: Signed Numbers, Part 3: the one habit
The drill
Ten problems
How many:
Tap your answer to each one, then press Check my answers at the bottom.Circle your answer to each one. The answer key, with the reasoning, is on the last page.