Adding and Subtracting within 20.

Front

What is addition?

Back

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

Tags

CCSS.1.OA.A.1

Front

What is subtraction?

Back

Subtraction is the process of taking one number away from another.

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CCSS.2.NBT.B.7

Front

What does the plus sign (+) mean?

Back

The plus sign means to add numbers together.

Tags

CCSS.1.OA.A.1

Front

What does the minus sign (−) mean?

Back

The minus sign means to subtract one number from another.

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CCSS.7.NS.A.1C

Front

What is the sum of 8 and 7?

Back

15

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CCSS.1.OA.C.6

CCSS.2.OA.B.2

Front

What is 15 minus 5?

Back

10

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CCSS.2.OA.A.1

Front

If you have 3 apples and you get 5 more, how many apples do you have in total?

Back

8 apples.

Tags

CCSS.1.OA.A.1

Front

What is 10 + 4?

Back

14

Tags

CCSS.1.OA.C.6

CCSS.2.OA.B.2

Front

What is 12 - 3?

Back

9

Tags

CCSS.1.OA.C.6

Front

If you see 7 fish and 5 more fish swim by, how many fish do you see now?

Back

12 fish.

Tags

CCSS.1.OA.A.1