Mikir is trying to help her younger brother understand why 12-(-5) =17
Mikir can explain to her younger brother that when subtracting a negative number, it is the same as adding its positive counterpart. In this case, the equation 12 - (-5) can be rewritten as 12 + 5.
To further explain, Mikir can use a number line or visual aids. Starting at the number 12 on the number line, her brother can count 5 places to the right, which would end up at the number 17. Therefore, 12 - (-5) equals 17.
To understand why 12 - (-5) = 17, Mikir can explain the concept of subtracting a negative number.
Step 1: Start with the expression 12 - (-5).
Step 2: Explain that subtracting a negative number is similar to adding a positive number.
Step 3: Emphasize that when we subtract a negative number, the two negatives cancel each other out and result in a positive number.
Step 4: Show the process step by step.
- First, write down the original expression: 12 - (-5).
- Next, replace the double negatives with a positive by changing the operation to addition: 12 + 5.
- Finally, perform the addition operation: 12 + 5 = 17.
Step 5: Conclude by explaining that when we subtract a negative number, it is the same as adding the positive form of that number. In this case, 12 - (-5) equals 12 + 5, which equals 17.
To help her younger brother understand why 12 - (-5) = 17, Mikir can explain the concept of subtracting a negative number.
1. Start by explaining the meaning of a negative number. Negative numbers represent values less than zero. In this case, -5 means we are taking away 5 from the original value.
2. Then, explain that subtracting a negative number is similar to adding a positive number. When we subtract a negative number, we are essentially reversing the subtraction and turning it into an addition.
3. In this example, 12 - (-5) can be rewritten as 12 + 5. This means we start with 12 and add 5 to it.
4. Mikir can show her brother the steps to calculate:
- Start with 12.
- Add 5 to it: 12 + 5 = 17.
- Therefore, 12 - (-5) is equal to 17.
By explaining the concept of subtracting a negative number and walking her brother through the steps, Mikir can help him understand why 12 - (-5) equals 17.