Add and Subtract Decimal Numbers
Adding and subtracting decimals works like whole numbers, but decimal points must line up.
Do this: Read the concept below, then try the quiz or activity.
Lesson 24 of 215
Concept
Rule: line up decimal points vertically.
Example addition: 12.45 + 3.70 = 16.15
Example subtraction: 18.20 - 6.75 = 11.45
You can add zeros to keep place values aligned: 5.2 = 5.20
Try it
Practice: Add and Subtract Decimal Numbers.