3-Digit Add and Subtract with Regrouping

Front

What is regrouping in addition?

Back

Regrouping in addition is when you combine groups of ten to make a larger group, so you can add numbers more easily.

Front

What is regrouping in subtraction?

Back

Regrouping in subtraction is when you take ten from one place value to help subtract a larger number from a smaller number.

Front

What is the sum of 245 and 378?

Back

The sum of 245 and 378 is 623.

Front

What is the difference when you subtract 145 from 300?

Back

The difference when you subtract 145 from 300 is 155.

Front

How do you add 57 and 68 using regrouping?

Back

First, add the ones: 7 + 8 = 15. Write down 5 and carry over 1. Then add the tens: 5 + 6 + 1 = 12. The answer is 125.

Front

How do you subtract 82 from 150 using regrouping?

Back

First, you can't subtract 2 from 0, so you regroup. Take 1 ten from 5, making it 4, and add 10 to 0, making it 10. Now, 10 - 2 = 8 and 4 - 8 = 6. The answer is 68.

Front

What is a three-digit number?

Back

A three-digit number is a number that has three places, such as 100, 245, or 999.

Front

What does the term 'place value' mean?

Back

Place value is the value of where a digit is in a number, such as hundreds, tens, or ones.

Front

What is the place value of 5 in the number 256?

Back

The place value of 5 in the number 256 is 50, because it is in the tens place.

Front

What is the first step in adding 3-digit numbers?

Back

The first step in adding 3-digit numbers is to line up the numbers by their place values.