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(d) th H t O (e) th H t O (f) th H t O

5 6 4 8 0 8 7 9 6
+ 4 4 8 + 8 8 0 3 4 8
+ 4 2 2

3. Write in columns and add.

(a) 622 + 297 (b) 636 + 243 (c) 399 + 455

(d) 632 + 398 (e) 436 + 243 + 364 (f) 326 + 836 + 248

Addition of 4-digit numbers

Adding 4-digit numbers is the same as adding 3-digit numbers.
Beginning with adding the ones, move on to adding the tens, then

hundreds and finally, the thousands.

Addition of 4-digit numbers without regrouping

Shruti and her father went to see their orchard.

Shruti: How many trees are there in our orchard?

Father: There are 2326 mango trees and 1253 apple trees.

Shruti: How do we find the total number of trees?
Father: We can find the total number of trees by adding them.

Write the numbers in columns and use the following steps:

Step 1: Add the ones. 6 + 3 = 9 ones

Write 9 in the ones column.

Step 2: Add the tens. 2 + 5 = 7 tens th H t O
Write 7 in the tens column. 2 3 2 6

Step 3: Add the hundreds. 3 + 2 = 5 hundreds + 1 2 5 3
Write 5 in the hundreds column. 3 5 7 9

Step 4: Add the thousands. 2 + 1 = 3 thousands
Write 3 in the thousands column.

Thus, the sum of 2326 and 1253 is
3579.

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