Addition and Subtraction with regrouping

Front

What is regrouping in addition?

Back

Regrouping in addition is the process of carrying over a value from one column to the next when the sum of a column exceeds 9.

Front

What is regrouping in subtraction?

Back

Regrouping in subtraction is the process of borrowing from the next column when the top number is smaller than the bottom number in a column.

Front

How do you add two large numbers?

Back

Align the numbers by place value, add each column starting from the right, and regroup if necessary.

Front

How do you subtract two large numbers?

Back

Align the numbers by place value, subtract each column starting from the right, and regroup if necessary.

Front

What is the sum of 23,456 and 13,220?

Back

The sum is 36,676.

Front

What is 1,000,000 minus 23,456?

Back

The result is 976,544.

Front

If 12,000,345 people attended a concert and 3,721,000 left early, how many stayed?

Back

8,279,345 people stayed.

Front

What is the difference between 1,000,000 and 625,901?

Back

The difference is 374,099.

Front

What does it mean to borrow in subtraction?

Back

Borrowing means taking 1 from the next higher place value to make the current digit larger when subtracting.

Front

What is the first step in solving an addition problem with regrouping?

Back

The first step is to align the numbers by their place values.