Adding 3Digit Numbers
Adding 3Digit Numbers: Learn
How to add threedigit numbers (for example 529 + 733).

Place one number above the other so that the hundreds, tens and ones
places are lined up. Draw a line under the bottom number.
5 2 9 + 7 3 3 
Add the ones place digits (9 + 3 = 12). This number is larger than 10 so
place a one above the tens place column and place the two below the line
in the ones place column.
1 5 2 9 + 7 3 3 2 
Add the tens place digits (1 + 2 + 3 = 6) and place the answer below the
line and in the tens place column.
1 5 2 9 + 7 3 3 6 2 
Add the numbers in the hundreds place column (5 + 7 = 12) and place the
2 below the line and before the other number below the line. Place the 1
from the twelve above the thousands place column.
1 5 2 9 + 7 3 3 2 6 2 
The thousands place column only has a 1 in it which should be placed
below the line in the thousands place column.
1 5 2 9 + 7 3 3 1 2 6 2
Adding ThreeDigit Numbers: Practice
What is the Sum of the two Numbers?
00:00

Press the Start Button To Begin
You have
0
correct and
0
incorrect.
This is
0
percent correct.
Play
Game Name  Description  Best Score 

How many correct answers can you get in 60 seconds?  0  
Extra time is awarded for each correct answer.
Play longer by getting more correct. 
0  
How fast can you get 20 more correct answers than wrong answers?  999 
Explore
Math Lessons by Grade
Math Topics
 Addition
 Algebra
 Comparing
 Counting
 Decimals
 Division
 Equations
 Estimation and Mental Math
 Exponents
 Fractions
 Geometry
 Measurement
 Money
 Multiplication
 Naming Numbers
 Patterns
 Percents and Ratios
 Place Value
 Properties
 Statistics
 Subtraction