write 3 different ones numbers you could add to 15 without needing to regroup.

write 3 different ones numbers you could add to 15 where you need to regroup to find the sum.

4 8 12

To find three different numbers that can be added to 15 without needing to regroup, we need to first ensure that the sum of these numbers is less than or equal to 15.

1. Example 1: 8 + 4 + 3 = 15
In this case, all three numbers can be added together without needing to regroup, as the result is 15.

2. Example 2: 6 + 5 + 4 = 15
Again, the sum of these three numbers is equal to 15, and no regrouping is required.

3. Example 3: 9 + 3 + 3 = 15
Similarly, adding these three numbers equals 15, and no regrouping is necessary.

Now, let's find three different numbers that need regrouping to reach the sum of 15.

1. Example 1: 9 + 6 = 15
In this case, when adding 9 and 6, we need to regroup the units from 15 to the tens, resulting in the tens place having 5 and the units place having 0.

2. Example 2: 7 + 8 = 15
In this scenario, we have to carry over the units place's value to the tens place, resulting in the tens place having 5 and the units place having 0.

3. Example 3: 12 + 3 = 15
Finally, adding 12 and 3 forces us to regroup, placing the tens place value of 10 in the tens place and the units place value of 5 in the units place.

Note: Regrouping, also known as carrying over or borrowing, is a process used in addition when the sum is greater than 9 for any given place value.