Common Core: 1st Grade Math : Common Core Math: Grade 1

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

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Example Questions

Example Question #157 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank. 

\(\displaystyle 3+\)__________\(\displaystyle =16\)

Possible Answers:

\(\displaystyle 12\)

\(\displaystyle 13\)

\(\displaystyle 11\)

\(\displaystyle 14\)

\(\displaystyle 15\)

Correct answer:

\(\displaystyle 13\)

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. \(\displaystyle 16-3=13\), which means \(\displaystyle 3+13=16\).

Example Question #742 : Operations & Algebraic Thinking

Fill in the blank. 

\(\displaystyle 3+\)__________\(\displaystyle =15\) 

Possible Answers:

\(\displaystyle 13\)

\(\displaystyle 9\)

\(\displaystyle 11\)

\(\displaystyle 12\)

\(\displaystyle 10\)

Correct answer:

\(\displaystyle 12\)

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. \(\displaystyle 15-3=12\), which means \(\displaystyle 3+12=15\).

Example Question #161 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank. 

\(\displaystyle 4+\)__________\(\displaystyle =7\) 

Possible Answers:

\(\displaystyle 3\)

\(\displaystyle 1\)

\(\displaystyle 5\)

\(\displaystyle 4\)

\(\displaystyle 2\)

Correct answer:

\(\displaystyle 3\)

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. \(\displaystyle 7-4=3\), which means \(\displaystyle 4+3=7\).

Example Question #741 : Operations & Algebraic Thinking

Fill in the blank. 

\(\displaystyle 4+\)__________\(\displaystyle =17\) 

Possible Answers:

\(\displaystyle 12\)

\(\displaystyle 9\)

\(\displaystyle 11\)

\(\displaystyle 10\)

\(\displaystyle 13\)

Correct answer:

\(\displaystyle 13\)

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. \(\displaystyle 17-4=13\), which means \(\displaystyle 4+13=17\).

Example Question #163 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank. 

\(\displaystyle 5+\)__________\(\displaystyle =16\) 

Possible Answers:

\(\displaystyle 14\)

\(\displaystyle 11\)

\(\displaystyle 12\)

\(\displaystyle 10\)

\(\displaystyle 13\)

Correct answer:

\(\displaystyle 11\)

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. \(\displaystyle 16-5=11\), which means \(\displaystyle 5+11=16\).

Example Question #164 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank. 

\(\displaystyle 5+\)__________\(\displaystyle =14\) 

Possible Answers:

\(\displaystyle 9\)

\(\displaystyle 6\)

\(\displaystyle 5\)

\(\displaystyle 7\)

\(\displaystyle 8\)

Correct answer:

\(\displaystyle 9\)

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. \(\displaystyle 14-5=9\), which means \(\displaystyle 5+9=14\).

Example Question #165 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank. 

\(\displaystyle 6+\)__________\(\displaystyle =15\) 

Possible Answers:

\(\displaystyle 9\)

\(\displaystyle 8\)

\(\displaystyle 6\)

\(\displaystyle 10\)

\(\displaystyle 7\)

Correct answer:

\(\displaystyle 9\)

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. \(\displaystyle 15-6=9\), which means \(\displaystyle 6+9=15\).

Example Question #231 : Working With Addition And Subtraction Equations

Fill in the blank. 

\(\displaystyle 6+\)__________\(\displaystyle =17\) 

Possible Answers:

\(\displaystyle 11\)

\(\displaystyle 10\)

\(\displaystyle 13\)

\(\displaystyle 9\)

\(\displaystyle 12\)

Correct answer:

\(\displaystyle 11\)

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. \(\displaystyle 17-6=11\), which means \(\displaystyle 6+11=17\).

Example Question #167 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank. 

\(\displaystyle 7+\)__________\(\displaystyle =17\) 

Possible Answers:

\(\displaystyle 12\)

\(\displaystyle 8\)

\(\displaystyle 10\)

\(\displaystyle 9\)

\(\displaystyle 11\)

Correct answer:

\(\displaystyle 10\)

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. \(\displaystyle 17-7=10\), which means \(\displaystyle 7+10=17\).

Example Question #168 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank. 

\(\displaystyle 1+\)__________\(\displaystyle =19\) 

Possible Answers:

\(\displaystyle 17\)

\(\displaystyle 15\)

\(\displaystyle 18\)

\(\displaystyle 16\)

\(\displaystyle 14\)

Correct answer:

\(\displaystyle 18\)

Explanation:

To find the missing piece of an addition problem, you can take the biggest number minus the smallest number. \(\displaystyle 19-1=18\), which means \(\displaystyle 1+18=19\).

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