two digit addition with regrouping

Front

What is two-digit addition with regrouping?

Back

Two-digit addition with regrouping is a method used to add numbers that are two digits long, where the sum of the digits in a column exceeds 9, requiring a carry-over to the next column.

Front

How do you perform addition with regrouping?

Back

1. Align the numbers by place value (ones under ones, tens under tens). 2. Start adding from the rightmost column (ones). 3. If the sum is 10 or more, write down the rightmost digit and carry over the left digit to the next column.

Front

What is the sum of 17 and 13?

Back

The sum of 17 and 13 is 30.

Front

What is 73 + 18?

Back

73 + 18 equals 91.

Front

If Fred baked 45 cookies and 28 cookies on Tuesday, how many cookies does he have after eating 15?

Back

Fred has 58 cookies left after eating 15.

Front

What is 43 + 16?

Back

43 + 16 equals 59.

Front

If Beth had 34 bouncy balls left after giving Sam 28, how many did she have to begin with?

Back

Beth had 62 bouncy balls to begin with.

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

Why is it important to line up numbers by place value when adding?

Back

Lining up numbers by place value ensures that each digit is added correctly according to its value (ones, tens, etc.), which is essential for accurate calculations.

Front

What is the first step in solving a two-digit addition problem?

Back

The first step is to write the numbers one above the other, aligning them by their place values.