We will learn about the addition of 4-digit numbers (without carrying and with carrying).

We know how to add 2 or 3, 3-digit numbers without carrying or with carrying. Now we will apply the same method when we add two 4-digit numbers (without carrying and with carrying) and three 4-digit numbers (without carrying and with carrying). The numbers which are added are called addends and the result obtained is called sum. The rules for addition of 4-digit numbers with other numbers are the same as that for the numbers having less digits.

1. Without carrying

Th   H   T   O

6    1   3   2

+ 3   4   2   5

7

Th   H   T   O

6    1   3   2

+ 3   4   2   5

5    7

Th   H   T   O

6    1   3   2

+ 3   4   2   5

5   5   7

Th   H   T   O

6   1   3   2

+ 3   4   2   5

9   5   5   7

2. With carrying

 Adding ones                    1       6     3     7     6 +    2     8     5     4                           0 Add ones i.e., 6 + 4 = 10. Write 0 below in ones column and carrying 1 into the tens column.
 Adding tens              1     1       6     3     7     6 +    2     8     5     4                    3     0 Add tens i.e., 1 + 7 + 5 = 13. Write 3 below in tens column and carrying 1 into the hundreds column.
 Adding hundreds       1     1       6     3     7     6 +    2     8     5     4              2     3      0 Add hundreds i.e., 1 + 3 + 8 = 12. Write 2 below in hundreds column and carrying 1 into the thousands column.
 Adding thousands       1            6     3     7     6 +    2     8     5     4       9     2     3     0 Add thousands i.e., 1 + 6 + 2 = 9. Write 9 below in thousands column.

Similarly add three 4-digit numbers using the above rules for without and with carrying.

 3. Find the sum of 5021, 3203 and 1210.   Th   H   T   O    5    0   2   1    3    2   0   3 + 1    2   1   0    9    4   3   4 Arrange the numbers in columns and add column wise.
 4. Find the sum of 2543, 1893 and 2678.    2      2    1   Th   H   T   O    2    5   4   3    1    8   9   3 + 2    6   7   8    7    1   1   4 Arrange the numbers in columns and add column wise.