Solve the following exercise:
21−41=?
To solve the subtraction 21−41, follow these steps:
- Step 1: Identify a common denominator. Here, the least common denominator of 2 and 4 is 4.
- Step 2: Convert 21 to a fraction with denominator 4. This involves multiplying both the numerator and denominator by 2: 21=42.
- Step 3: 41 already has the denominator of 4, so we don't need any adjustment there.
- Step 4: Subtract the numerators: 2−1=1.
- Step 5: Write the result over the common denominator: 41.
Therefore, the solution to 21−41 is 41.