Definition:

Three-digit addition involves combining two or more numbers, each with three digits. This process is done by adding the values in the ones, tens, and hundreds of places, starting from the right (one's place) and moving to the left. If the sum in any place value exceeds 9, a carry is added to the next higher place value.

Example 1: Add 345 and 7.

Solution:

Write the numbers in column form:

345
+ 7
-----

1. Add the ones in place: 5+7=12 (write 2, carry over 1 to the tens place)
2. Add the tens place: 4+1=5
3. Add the hundreds place:3+0=3
4. Final solution:
5. 345+7=352

Example 2: Add 208 and 9.

Solution:

Write the numbers in column form:

208
+ 9
-----

1. Add the ones in place: 8+9=17 (write 7, carry over 1 to the tens place.)
2. Add the tens place: 0+1=1
3. Add the hundreds place:2+0=2
4. Final solution:
5. 208+9=217

Example 3: Add 603 and 8.

Solution:

Write the numbers in column form:

603
+ 8
-----

1. Add the ones in place: 3+8=11 (write 1, carry over 1 to the tens place)
2. Add the tens place: 0+1=1
3. Add the hundreds place:6+0=6
4. Final solution:
5. 603+8=611

Let's practice solving place values, and stay tuned with us for more content.