Double Digit Addition

Front

What is double digit addition?

Back

Double digit addition refers to the process of adding two numbers that each have two digits, resulting in a sum that can be either one or two digits.

Front

How do you add two double digit numbers?

Back

To add two double digit numbers, align the numbers by their place values (tens and units), add the units first, carry over if necessary, and then add the tens.

Front

What is the sum of 45 and 37?

Back

The sum of 45 and 37 is 82.

Front

What is the sum of 38 and 42?

Back

The sum of 38 and 42 is 80.

Front

What is the sum of 13 and 58?

Back

The sum of 13 and 58 is 71.

Front

What is the sum of 53 and 29?

Back

The sum of 53 and 29 is 82.

Front

What is the sum of 67 and 15?

Back

The sum of 67 and 15 is 82.

Front

What is carrying in addition?

Back

Carrying in addition is the process of moving a value from one column to the next when the sum of that column exceeds the base value (e.g., 10 in base 10).

Front

What is the importance of place value in addition?

Back

Place value is important in addition because it helps to correctly align numbers by their tens, units, hundreds, etc., ensuring accurate calculations.

Front

What strategies can be used to simplify double digit addition?

Back

Strategies include breaking numbers into tens and units, using number lines, or rounding numbers to the nearest ten and adjusting the sum.