Double Digit Addition

Front

What is double digit addition?

Back

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

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CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

What is the sum of 34 and 7?

Back

The sum of 34 and 7 is 41.

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CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

If Sam has 26 cookies and receives 19 more, how do you calculate the total number of cookies he has?

Back

To find the total number of cookies, add 26 and 19: 26 + 19 = 45.

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CCSS.2.OA.A.1

Front

What is the result of adding 10 and 23?

Back

The result of adding 10 and 23 is 33.

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CCSS.2.OA.A.1

Front

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

Back

The first step is to align the numbers vertically by their place values (tens and units) before adding.

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CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

How do you handle carrying over in double digit addition?

Back

If the sum of the digits in a column exceeds 9, carry over the tens to the next column on the left.

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CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

Front

What is the importance of place value in addition?

Back

Place value helps in correctly aligning numbers and understanding the value of each digit in the addition process.

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CCSS.2.NBT.B.7

Front

What is the sum of 76 and 0?

Back

The sum of 76 and 0 is 76.

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CCSS.1.OA.B.3

Front

How can you check your work after performing double digit addition?

Back

You can check your work by using the inverse operation, subtraction, to see if subtracting one of the addends from the sum gives you the other addend.

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CCSS.7.NS.A.1C

Front

What is a common mistake to avoid in double digit addition?

Back

A common mistake is misaligning the numbers by their place values, which can lead to incorrect sums.

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CCSS.2.NBT.B.7

CCSS.3.NBT.A.2