Addition With Regrouping - Carry Over


 
 
Concept Explanation
 

Addition With Regrouping - Carry Over

Regrouping means to rearrange the numbers to make the addition easier.

Let us consider the case when we are performing the following Addition

Add 45 and 36

In the expanded form

45 = 40 + 5 = 4 tens + 5 ones

Similarly

36 = 30 + 6 = 3 tens + 6 ones

Now let us write the numbers in columns to add as shown in the figure below

Now 7 tens + 11 ones = (7 + 1) tens and 1 ones =8 tens + 1 ones = 81

So 45 + 36 = 81

 

Illustration 1: Fill in the blank.

A. 6

B. 1

C. 4

Answer: A

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