Final answer:
To work out 23 + 12, add the ones and tens places separately. The sum is 35. In a mixed number, the whole number part is 35.
Step-by-step explanation:
To work out 23 + 12, you start by adding the ones place: 3 + 2 = 5. Then, you add the tens place: 2 + 1 = 3. So, the sum is 35.
In a mixed number, the whole number part is before the fraction. There is no fraction in this sum, so the whole number part is 35. Therefore, the mixed number representation of 23 + 12 is 35.
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