Common Core: 2nd Grade Math : Operations & Algebraic Thinking

Study concepts, example questions & explanations for Common Core: 2nd Grade Math

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Example Questions

Example Question #451 : Operations & Algebraic Thinking

Is there an even or an odd number of dots below? 

 

Screen shot 2015 12 01 at 10.55.02 am

Possible Answers:

Both

Odd

Even

Neither

Correct answer:

Even

Explanation:

When trying to decide if we have an even or an odd number of items, we can put the items in pairs of two. If each item is in a pair, then we have an even number of items. If there is one item that isn't in a pair, then we have an odd number of items. 

In this case, our dots are in pairs of two, so we have an even number of dots. 

Example Question #452 : Operations & Algebraic Thinking

Is there an even or an odd number of dots below? 

Screen shot 2015 12 01 at 10.43.03 am

 

Possible Answers:

Both

Neither

Odd

Even

Correct answer:

Even

Explanation:

When trying to decide if we have an even or an odd number of items, we can put the items in pairs of two. If each item is in a pair, then we have an even number of items. If there is one item that isn't in a pair, then we have an odd number of items. 

In this case, our dots are in a pair of two, so we have an even number of dots. 

Example Question #453 : Operations & Algebraic Thinking

Is there an even or an odd number of dots below? 

Screen shot 2015 12 01 at 10.44.22 am

 

Possible Answers:

Odd

Both

Even

Neither

Correct answer:

Odd

Explanation:

When trying to decide if we have an even or an odd number of items, we can put the items in pairs of two. If each item is in a pair, then we have an even number of items. If there is one item that isn't in a pair, then we have an odd number of items. 

In this case, we have one dot not in a pair, so we have an odd number of dots. 

Example Question #454 : Operations & Algebraic Thinking

Is there an even or an odd number of dots below? 

Screen shot 2015 12 01 at 10.44.34 am

Possible Answers:

Odd

Neither

Both

Even

Correct answer:

Even

Explanation:

When trying to decide if we have an even or an odd number of items, we can put the items in pairs of two. If each item is in a pair, then we have an even number of items. If there is one item that isn't in a pair, then we have an odd number of items. 

In this case, our dots are in pairs of two, so we have an even number of dots. 

Example Question #455 : Operations & Algebraic Thinking

Is there an even or an odd number of dots below? 

Screen shot 2015 12 01 at 10.42.14 am

Possible Answers:

Both

Even

Odd

Neither

Correct answer:

Odd

Explanation:

When trying to decide if we have an even or an odd number of items, we can put the items in pairs of two. If each item is in a pair, then we have an even number of items. If there is one item that isn't in a pair, then we have an odd number of items. 

In this case, we have one dot so it's can't be in a pair, so we have an odd number of dots. 

Example Question #456 : Operations & Algebraic Thinking

Is there an even or an odd number of dots below? 

Screen shot 2015 12 01 at 10.44.05 am

Possible Answers:

Odd

Even

Neither

Both

Correct answer:

Even

Explanation:

When trying to decide if we have an even or an odd number of items, we can put the items in pairs of two. If each item is in a pair, then we have an even number of items. If there is one item that isn't in a pair, then we have an odd number of items. 

In this case, our dots are in pairs of two, so we have an even number of dots. 

Example Question #1 : Use Addition To Determine Number Of Objects In A Rectangular Array: Ccss.Math.Content.2.Oa.C.4

What is the equation that shows the sum of the squares represented by this rectangular array? 

Screen shot 2015 07 20 at 12.14.50 pm

Possible Answers:

Correct answer:

Explanation:

 When we count the number of squares in this picture we get . We have  rows with  squares in each row. Our math equation for this set could be written as

Example Question #1161 : Ssat Elementary Level Quantitative (Math)

What is the equation that shows the sum of the squares represented by this rectangular array?


Screen shot 2015 07 20 at 12.33.14 pm

Possible Answers:

Correct answer:

Explanation:

When we count the number of squares in this picture we get . We have  rows with  squares in each row. Our math equation for this set could be written as 

Example Question #102 : How To Add

What is the equation that shows the sum of the squares represented by this rectangular array?


Screen shot 2015 07 20 at 12.43.39 pm

Possible Answers:

Correct answer:

Explanation:

When we count the number of squares in this picture we get . We have  rows with  squares in each row. Our math equation for this picture could be written as  

Example Question #4 : Use Addition To Determine Number Of Objects In A Rectangular Array: Ccss.Math.Content.2.Oa.C.4

What is the equation that shows the sum of the squares represented by this rectangular array?


Screen shot 2015 07 20 at 12.53.02 pm

Possible Answers:

Correct answer:

Explanation:

When we count the number of squares in this picture we get . We have  rows with  squares in each row. Our math equation for this picture could be written as  

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