Addition with Regrouping

Front

What is regrouping in addition?

Back

Regrouping in addition is the process of carrying over values from one column to the next when the sum of a column exceeds the base value (e.g., 10 in the ones place or 100 in the tens place).

Front

How do you round a number to the nearest ten?

Back

To round a number to the nearest ten, look at the digit in the ones place. If it is 5 or greater, round up; if it is less than 5, round down.

Front

What is the process of rounding to the nearest hundred?

Back

To round a number to the nearest hundred, look at the digit in the tens place. If it is 5 or greater, round up; if it is less than 5, round down.

Front

What is the sum of 89 and 72 when rounded to the nearest ten?

Back

When rounded to the nearest ten, 89 becomes 90 and 72 becomes 70. Therefore, 90 + 70 = 160.

Front

How do you find the total number of items when given a remaining quantity and sold quantity?

Back

To find the total number of items, add the remaining quantity to the sold quantity.

Front

If Mrs. Griffey drove 278 miles on Tuesday and 342 miles on Wednesday, how do you calculate the total miles driven?

Back

To calculate the total miles driven, simply add the miles driven on Tuesday and Wednesday: 278 + 342 = 620.

Front

What is the importance of rounding in addition problems?

Back

Rounding simplifies calculations and helps estimate sums quickly, making it easier to solve problems without exact figures.

Front

How do you perform addition with regrouping?

Back

To perform addition with regrouping, add the digits in each column starting from the right. If the sum exceeds the base value, carry over to the next column.

Front

What is the result of rounding 186 and 109 to the nearest hundred before adding?

Back

Rounding 186 to the nearest hundred gives 200, and rounding 109 gives 100. Therefore, 200 + 100 = 300.

Front

What is the result of rounding 312 and 606 to the nearest hundred before adding?

Back

Rounding 312 to the nearest hundred gives 300, and rounding 606 gives 600. Therefore, 300 + 600 = 900.