Question

Explain why you should record a 1 in the tens column when you regroup in an addition problem

Answer 1

because if u dont regroup u get a completely different answer
  19
+19
--------
218 
 
thats what u get if u dont regroup unlike when its done the right way
 
  19
+19
-------
  38

Answer 2

Answer:

Explained below.

Step-by-step explanation:

Consider the addition below:

   19

+ 29

Since the sum in the one's column is 18, a two-digit number, we separate the number as 1 ten and 8 ones.

We now, keep the unit digit 8 and carry over the 1 ten to the tenth column.

Hope this makes sense.