Common Core: 1st Grade Math : Use Properties of Operations to Add and Subtract: CCSS.MATH.CONTENT.1.OA.B.3

Study concepts, example questions & explanations for Common Core: 1st Grade Math

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Example Questions

Example Question #1 : Common Core Math: Grade 1

Which math problem below equals \(\displaystyle 12+8+2?\)

Possible Answers:

\(\displaystyle 20+2\)

 

\(\displaystyle 12+9\)

\(\displaystyle 20+4\)

\(\displaystyle 12+8\)

Correct answer:

\(\displaystyle 20+2\)

 

Explanation:

We can add \(\displaystyle 12+8=20\). So the math problem becomes \(\displaystyle 20+2\). Both \(\displaystyle 20+2\) and \(\displaystyle 12+8+2\) equal \(\displaystyle 22\).

Example Question #1 : Common Core Math: Grade 1

Which math problem below equals \(\displaystyle 3+7+9?\) 

Possible Answers:

\(\displaystyle 10+9\)

     

\(\displaystyle 10+10\)

\(\displaystyle 9+11\)

\(\displaystyle 9+12\)

Correct answer:

\(\displaystyle 10+9\)

     

Explanation:

We can add \(\displaystyle 7+3=10\). So the math problem becomes \(\displaystyle 10+9\). Both \(\displaystyle 10+9\) and \(\displaystyle 3+7+9\) equal \(\displaystyle 19\)

Example Question #1 : Understanding And Applying Properties Of Operations And The Relationship Between Addition And Subtraction

Which math problem below equals \(\displaystyle 14+6+3?\)

Possible Answers:

\(\displaystyle 14+10\)

\(\displaystyle 14+12\)

\(\displaystyle 20+3\)

\(\displaystyle 18+3\)

Correct answer:

\(\displaystyle 20+3\)

Explanation:

We can add \(\displaystyle 14+6=20\). So the math problem becomes \(\displaystyle 20+3\). Both \(\displaystyle 20+3\) and \(\displaystyle 14+6+3\) equal \(\displaystyle 23\)

Example Question #2 : Common Core Math: Grade 1

Which math problem below equals \(\displaystyle 13+2+5?\)

Possible Answers:

\(\displaystyle 15+2\)

\(\displaystyle 5+20\)

\(\displaystyle 5+14\)

\(\displaystyle 15+5\)

Correct answer:

\(\displaystyle 15+5\)

Explanation:

We can add \(\displaystyle 13+2=15\). So the math problem becomes \(\displaystyle 15+5\). Both \(\displaystyle 15+5\) and \(\displaystyle 13+2+5\) equal \(\displaystyle 20\)

Example Question #3 : Common Core Math: Grade 1

Which math problem below equals \(\displaystyle 16+2+4?\)

Possible Answers:

\(\displaystyle 16+8\)

\(\displaystyle 20+2\)

           

\(\displaystyle 20+4\)

\(\displaystyle 16+4\)

Correct answer:

\(\displaystyle 20+2\)

           

Explanation:

We can add \(\displaystyle 16+4=20\). So the math problem becomes \(\displaystyle 20+2\). Both \(\displaystyle 20+2\) and \(\displaystyle 16+2+4\) equal \(\displaystyle 22\)

Example Question #4 : Common Core Math: Grade 1

Which math problem below equals \(\displaystyle 8+7+2?\)

Possible Answers:

\(\displaystyle 7+9\)

\(\displaystyle 15+2\)

 

\(\displaystyle 15+7\)

\(\displaystyle 7+11\)

Correct answer:

\(\displaystyle 15+2\)

 

Explanation:

We can add \(\displaystyle 8+7=15\). So the new math problem becomes \(\displaystyle 15+2\). Both \(\displaystyle 15+2\) and \(\displaystyle 8+7+2\) equal \(\displaystyle 17\).

Example Question #2 : Common Core Math: Grade 1

Which math problem below equals \(\displaystyle 8+3+2?\) 

Possible Answers:

\(\displaystyle 11+4\)

\(\displaystyle 10+2\)

\(\displaystyle 12+2\)

\(\displaystyle 10+3\)

   

Correct answer:

\(\displaystyle 10+3\)

   

Explanation:

We can add \(\displaystyle 8+2=10\). So the new math problem becomes \(\displaystyle 10+3\). Both \(\displaystyle 10+3\) and \(\displaystyle 8+3+2\) equal \(\displaystyle 13\)

Example Question #1 : Common Core Math: Grade 1

Which math problem below equals \(\displaystyle 5+9+2?\)

Possible Answers:

\(\displaystyle 11+5\)

\(\displaystyle 10+5\)

\(\displaystyle 15+2\)

\(\displaystyle 9+2\)

Correct answer:

\(\displaystyle 11+5\)

Explanation:

We can add \(\displaystyle 9+2=11\). So the math problem becomes \(\displaystyle 11+5\). Both \(\displaystyle 11+5\) and \(\displaystyle 5+9+2\) equal \(\displaystyle 16\)

Example Question #2 : Common Core Math: Grade 1

Which math problem below equals \(\displaystyle 6+9+3?\)

Possible Answers:

\(\displaystyle 10+3\)

\(\displaystyle 12+6\)

\(\displaystyle 11+6\)

\(\displaystyle 16+3\)

Correct answer:

\(\displaystyle 12+6\)

Explanation:

We can add \(\displaystyle 9+3=12\). So the math problem becomes \(\displaystyle 12+6\). Both \(\displaystyle 12+6\) and \(\displaystyle 6+9+3\) equal \(\displaystyle 18\).

Example Question #1 : Common Core Math: Grade 1

Which math problem below equals \(\displaystyle 8+2+3?\)

Possible Answers:

\(\displaystyle 12+2\)

\(\displaystyle 10+3\)

\(\displaystyle 8+3\)

\(\displaystyle 6+4\)

Correct answer:

\(\displaystyle 10+3\)

Explanation:

We can add \(\displaystyle 8+2=10\). So the math problem becomes \(\displaystyle 10+3\). Both \(\displaystyle 8+2+3=13\) and \(\displaystyle 10+3=13\)

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