Numbers ending in zeros are numbers such as 20, 300, 4,000, or 10,000. These numbers are easier to add and subtract because the zeros help us keep place value organized.
Think of zeros as “place holders.” They show the size of the number but do not change how you add or subtract the other digits.
To add numbers ending in zeros, line up the digits by place value and add the nonzero digits. Then keep the zeros in their places.
Always line up numbers correctly by place value before adding.
To subtract numbers ending in zeros, line up the digits by place value and subtract as usual. If needed, regroup (borrow) from the next higher place value.
If you cannot subtract the smaller digit from the larger one in a place value column, regroup from the next place to the left.
Place value tells us the value of each digit in a number. It helps us know where to put each digit when adding or subtracting.
When numbers end in zeros, those zeros make it easier to see the place value of the nonzero digits.
Adding and subtracting numbers ending in zeros helps solve real-world problems, such as working with money, distances, or large groups.
Look for problems in everyday life where numbers ending in zeros are used. This helps you see why these skills are important.