Do you need to regroup 10 tens for 1 hundred when you add 241 + 387?
Yes. Notice the 8 and the 4 in the tens column, that is 12 in the tens column (120), or 10 tens and 20. Regroup, leaving 20.
To solve the addition problem 241 + 387, you need to add the digits in each column from right to left.
Starting with the units column, you have 1 + 7, which equals 8.
Moving to the tens column, you have 4 + 8, which equals 12.
However, in the decimal system, 12 is greater than 9, which means it cannot be represented directly in the tens column. In order to represent 12, you need to regroup or carry over.
So, you regroup the 10 tens from the 12, which is equivalent to 1 hundred. You write down 2 in the tens column and carry forward the 1 to the hundreds column.
In the hundreds column, you now have 1 (from carrying over) plus 2 plus 3, which equals 6.
Finally, in the thousands column, you simply have 2.
Therefore, the sum of 241 + 387 is 628.