Addition and Subtraction-3 digit numbers

Front

What is addition?

Back

Addition is the process of finding the total or sum by combining two or more numbers.

Front

What is subtraction?

Back

Subtraction is the process of taking one number away from another.

Front

What is a 3-digit number?

Back

A 3-digit number is a number that has three digits, ranging from 100 to 999.

Front

How do you add 3-digit numbers?

Back

To add 3-digit numbers, align the numbers by place value (hundreds, tens, units) and add each column starting from the right.

Front

How do you subtract 3-digit numbers?

Back

To subtract 3-digit numbers, align the numbers by place value and subtract each column starting from the right.

Front

What is the sum of 43 and 57?

Back

The sum of 43 and 57 is 100.

Front

What is the difference between 537 and 254?

Back

The difference between 537 and 254 is 283.

Front

If you have 90 marshmallows and add 382 more, how many do you have?

Back

You have 472 marshmallows.

Front

What is 644 + 728?

Back

644 + 728 = 1,372.

Front

Estimate the sum of 138 and 309.

Back

The estimated sum of 138 and 309 is about 450.