2 and 3 Digit Addition and Subtractionion

Front

What is addition?

Back

Addition is the process of finding the total or sum by combining two or more numbers.

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CCSS.1.OA.A.1

Front

What is subtraction?

Back

Subtraction is the process of finding the difference between two numbers by taking one number away from another.

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CCSS.2.OA.A.1

Front

What is a 2-digit number?

Back

A 2-digit number is a number that has two places, such as 10 to 99.

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CCSS.1.NBT.A.1

Front

What is a 3-digit number?

Back

A 3-digit number is a number that has three places, such as 100 to 999.

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CCSS.2.NBT.A.3

Front

How do you add two numbers?

Back

To add two numbers, align them by their place values and add each column starting from the right.

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CCSS.2.NBT.B.7

Front

How do you subtract two numbers?

Back

To subtract two numbers, align them by their place values and subtract each column starting from the right.

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CCSS.3.NBT.A.2

CCSS.2.NBT.B.7

Front

What is the sum of 23 and 45?

Back

The sum of 23 and 45 is 68.

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CCSS.2.NBT.B.5

CCSS.1.NBT.C.4

Front

What is the difference between 78 and 34?

Back

The difference between 78 and 34 is 44.

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CCSS.3.NBT.A.2

CCSS.2.NBT.B.7

Front

If you have 56 marbles and you give away 23, how many do you have left?

Back

You have 33 marbles left.

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CCSS.2.OA.A.1

Front

If you have 150 apples and you receive 75 more, how many apples do you have now?

Back

You have 225 apples now.

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CCSS.3.NBT.A.2

CCSS.2.NBT.B.7