We will learn addition of three 3-digit numbers.
Adding three 3-digit numbers is same as adding two 3-digit numbers.
1. Add 423112 and 260.
2. Let us add 123, 571 and 238.
Write the numbers one below the other.
Step I: Add the ones.
3 ones + 1 one + 8 ones = 12 ones
Regroup: 12 ones = 1 ten and 2 ones
Write 2 in the ones place.
Carry over 1 ten and write it under “T’.
Step II: Add the tens.
1 ten (carried over) + 2 tens +7 tens + 3 tens = 13 tens
Regroup: 13 tens = 1 hundred and 3 tens
Write 3 in the tens place.
Carry over 1 hundred and write it under ‘H’.
Step III: Add the hundreds.
1 hundred (carried over) + 1 hundred + 5 hundreds + 2 hundreds = 9 hundreds
Write 9 in the hundreds place.
The sum is 932.
1. Add the following Three 3-Digit Numbers Without Regrouping:
2. Add the following Three 3-Digit Numbers With Regrouping:
3. Arrange in columns and add:
4. Add the following 3 three-digit numbers as shown.