Add and Subtract 2-Digit Numbers

Front

What is the sum of 26 and 52?

Back

The sum of 26 and 52 is 78.

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CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

What is 59 minus 29?

Back

59 minus 29 equals 30.

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CCSS.7.NS.A.1C

Front

What is 43 minus 12?

Back

43 minus 12 equals 31.

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CCSS.2.OA.A.1

Front

What is 83 minus 21?

Back

83 minus 21 equals 62.

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CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

Front

If Ms. Gordon gave Leo 25 tennis balls and he lost 12, how many does he have left?

Back

Leo has 13 tennis balls left (25 - 12 = 13).

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CCSS.2.OA.A.1

Front

What is the definition of addition?

Back

Addition is the mathematical operation of combining two or more numbers to get a total.

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CCSS.1.OA.A.1

Front

What is the definition of subtraction?

Back

Subtraction is the mathematical operation of taking one number away from another.

Front

What is a two-digit number?

Back

A two-digit number is a number that has two digits, ranging from 10 to 99.

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CCSS.1.NBT.A.1

Front

How do you check your addition?

Back

You can check your addition by reversing the operation and using subtraction to see if the original numbers are recovered.

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CCSS.2.NBT.B.7

Front

How do you check your subtraction?

Back

You can check your subtraction by adding the result to the subtracted number to see if you get the original number.

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CCSS.1.OA.A.1