The k8 school logo

A Comprehensive Guide to Homeschooling

How to add two-digit numbers with regrouping


2-digit-regroup-1

 

 

Column up the addition

2-digit-regroup-2

 

Sum up the units column

2-digit-regroup-3

 

 

But your answer will be wrong, if you place number 14 like the way shown below.

2-digit-regroup-4

 

 

Rule:

WE CANNOT PLACE A NUMBER WHICH IS GREATER THAN 9 UNDER ANY PLACE VALUE LIKE SHOWN IN THE ABOVE PICTURE.

Because;

2-digit-regroup-5

 

 

How to place a number greater than 9 in the Units Column.

Explanation:

Place number 14 in its correct place values.

2-digit-regroup-6

 

 

1 belongs to the Tens column whereas 4 belongs to the Units column.

2-digit-regroup-7

 

 

Place the digits correctly under the two columns.

2-digit-regroup-8

 

 

Now add the Tens column.

2-digit-regroup-9