Common Core: 1st Grade Math : Use the Unknown-Addend to Subtract: CCSS.MATH.CONTENT.1.OA.B.4

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

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Example Questions

Example Question #1 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to \(\displaystyle 4\) to get \(\displaystyle 13?\)

 

Possible Answers:

\(\displaystyle 5\)

\(\displaystyle 9\)

\(\displaystyle 8\)

\(\displaystyle 7\)

\(\displaystyle 6\)

Correct answer:

\(\displaystyle 9\)

Explanation:

 \(\displaystyle 4+9=13\) or as a subtraction problem, \(\displaystyle 13-4=9\).

Example Question #2 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to \(\displaystyle 6\) to get to \(\displaystyle 12?\) 

 

Possible Answers:

\(\displaystyle 10\)

\(\displaystyle 6\)

\(\displaystyle 9\)

\(\displaystyle 8\)

\(\displaystyle 7\)

Correct answer:

\(\displaystyle 6\)

Explanation:

\(\displaystyle 6+6=12\) or as a subtraction problem, \(\displaystyle 12-6=6\).

Example Question #14 : Operations & Algebraic Thinking

What can we add to \(\displaystyle 7\) to get \(\displaystyle 10?\)

Possible Answers:

\(\displaystyle 2\)

\(\displaystyle 5\)

\(\displaystyle 1\)

\(\displaystyle 3\)

\(\displaystyle 4\)

Correct answer:

\(\displaystyle 3\)

Explanation:

\(\displaystyle 7+3=10\) or as a subtraction problem, \(\displaystyle 10-7=3\).

Example Question #15 : Operations & Algebraic Thinking

What can we add to \(\displaystyle 5\) to get to \(\displaystyle 9?\) 

 

Possible Answers:

\(\displaystyle 3\)

\(\displaystyle 0\)

\(\displaystyle 1\)

\(\displaystyle 2\)

\(\displaystyle 4\)

Correct answer:

\(\displaystyle 4\)

Explanation:

 \(\displaystyle 5+4=9\) or as a subtraction problem, \(\displaystyle 9-5=4\).

Example Question #16 : Operations & Algebraic Thinking

What can we add to \(\displaystyle 12\) to get to \(\displaystyle 16?\) 

 

Possible Answers:

\(\displaystyle 6\)

\(\displaystyle 8\)

\(\displaystyle 7\)

\(\displaystyle 5\)

\(\displaystyle 4\)

Correct answer:

\(\displaystyle 4\)

Explanation:

\(\displaystyle 12+4=16\) or as a subtraction problem, \(\displaystyle 16-12=4\).

Example Question #17 : Operations & Algebraic Thinking

What can we add to \(\displaystyle 9\) to get to \(\displaystyle 15?\) 

 

Possible Answers:

\(\displaystyle 6\)

\(\displaystyle 7\)

\(\displaystyle 8\)

\(\displaystyle 5\)

\(\displaystyle 4\)

Correct answer:

\(\displaystyle 6\)

Explanation:

\(\displaystyle 9+6=15\) or as a subtraction problem, \(\displaystyle 15-9=6\).

Example Question #2 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to \(\displaystyle 12\) to get \(\displaystyle 20?\) 

 

Possible Answers:

\(\displaystyle 5\)

\(\displaystyle 8\)

\(\displaystyle 7\)

\(\displaystyle 6\)

\(\displaystyle 4\)

Correct answer:

\(\displaystyle 8\)

Explanation:

\(\displaystyle 12+8=20\) or as a subtraction problem, \(\displaystyle 20-12=8\).

Example Question #3 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to \(\displaystyle 12\) to get to \(\displaystyle 14?\)

 

Possible Answers:

\(\displaystyle 3\)

\(\displaystyle 2\)

\(\displaystyle 4\)

\(\displaystyle 6\)

\(\displaystyle 5\)

Correct answer:

\(\displaystyle 2\)

Explanation:

\(\displaystyle 12+2=14\) or as a subtraction problem, \(\displaystyle 14-12=2\).

Example Question #1 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to \(\displaystyle 14\) to get \(\displaystyle 18?\)

 

Possible Answers:

\(\displaystyle 7\)

\(\displaystyle 6\)

\(\displaystyle 5\)

\(\displaystyle 4\)

\(\displaystyle 8\)

Correct answer:

\(\displaystyle 4\)

Explanation:

\(\displaystyle 14+4=18\) or as a subtraction problem, \(\displaystyle 18-14=4\).

Example Question #2 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to \(\displaystyle 6\) to get to \(\displaystyle 14?\) 

 

Possible Answers:

\(\displaystyle 7\)

\(\displaystyle 5\)

\(\displaystyle 6\)

\(\displaystyle 8\)

\(\displaystyle 9\)

Correct answer:

\(\displaystyle 8\)

Explanation:

\(\displaystyle 6+8=14\) or as a subtraction problem, \(\displaystyle 14-6=8\).

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