Common Core: Kindergarten Math : Understanding Addition and Subtraction

Study concepts, example questions & explanations for Common Core: Kindergarten Math

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Example Questions

Example Question #1 : Operations & Algebraic Thinking

Add the triangles Screen shot 2015 08 20 at 11.07.59 ambelow. 


Screen shot 2015 08 20 at 11.52.36 am

Possible Answers:

Correct answer:

Explanation:

When we add we count up. We have  triangle in the first box, and then  triangles in the second box. In total we have  triangles. If you start at  on a number line and count up , you have .

Screen shot 2015 08 20 at 11.58.41 am

Example Question #1 : Represent Addition And Subtraction In Various Forms: Ccss.Math.Content.K.Oa.A.1

Add the triangles Screen shot 2015 08 20 at 11.07.59 ambelow. 

Screen shot 2015 08 20 at 2.54.55 pm

Possible Answers:

Correct answer:

Explanation:

When we add we count up. We have  triangles in the first box, and then  triangles in the second box. In total we have  triangles. If you start at  on a number line and count up , you have .

Screen shot 2015 08 20 at 2.58.17 pm

Example Question #1 : Represent Addition And Subtraction In Various Forms: Ccss.Math.Content.K.Oa.A.1

Use the triangles Screen shot 2015 08 20 at 11.07.59 ambelow to help you answer the subtraction problem. 


Screen shot 2015 08 21 at 12.23.37 pm

Possible Answers:

Correct answer:

Explanation:

We have  triangles and we want to subtract  triangle, which means the same thing as take them away. We can cross off the  triangle that we are subtracting, and count the number that we have left. In this case we have  triangles left. Subtraction is like counting backwards. We can start at  and count back .

Screen shot 2015 08 21 at 12.23.53 pm

Example Question #2 : Understanding Addition And Subtraction

Sarah has  square and Tim has  squares. How many squares do they have altogether? 

Possible Answers:

Correct answer:

Explanation:

Screen shot 2015 08 27 at 11.22.06 am

If we count all the squares together we have  squares. 

Example Question #3 : Understanding Addition And Subtraction

Jenny has  square and Joe has  squares. How many squares do they have altogether? 

Possible Answers:

Correct answer:

Explanation:

Screen shot 2015 08 27 at 11.29.39 am

If we count all the squares together we have  squares. 

Example Question #4 : Understanding Addition And Subtraction

Cameron has  squares and Chuck has  square. How many squares do they have altogether? 

Possible Answers:

Correct answer:

Explanation:

Screen shot 2015 08 27 at 11.34.16 am

If we count all the squares together we have  squares. 

Example Question #5 : Understanding Addition And Subtraction

Natalie has  squares and Ashley has  squares. How many squares do they have altogether? 

Possible Answers:

Correct answer:

Explanation:

Screen shot 2015 08 27 at 11.33.32 am

If we count all the squares together we have  squares. 

Example Question #6 : Understanding Addition And Subtraction

Molly has  square and John has  squares. How many squares do they have altogether? 

Possible Answers:

Correct answer:

Explanation:

Screen shot 2015 08 27 at 11.32.42 am

If we count all the squares together we have  square. 

Example Question #6 : Understanding Addition And Subtraction

Shelly has  square and Linda has  squares. How many squares do they have altogether? 

Possible Answers:

Correct answer:

Explanation:

Screen shot 2015 08 27 at 11.31.35 am

If we count all the squares together we have  squares. 

Example Question #7 : Understanding Addition And Subtraction

Matt has  square and Lisa has  squares. How many squares do they have altogether? 

Possible Answers:

Correct answer:

Explanation:

 

Screen shot 2015 08 27 at 11.28.50 am

If we count all the squares together we have  squares. 

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