We are open Saturday and Sunday!

Call Now to Set Up Tutoring:

(847) 840-2442

Common Core: 1st Grade Math : Operations & Algebraic Thinking

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

Create An Account

All Common Core: 1st Grade Math Resources

7 Diagnostic Tests 180 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #64 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}12\\ -\ 11\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1

$\frac{\begin{array}[b]{r}12\\ -\ 11\end{array}}{ \ \ \ \ \ \space 1}$

Report an Error

Example Question #65 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}10\\ -\ 8\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

10, 9, 8, 7, 6, 5, 4, 3, 2

$\frac{\begin{array}[b]{r}10\\ -\ 8\end{array}}{ \ \ \ \space 2}$

Report an Error

Example Question #66 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}9\\ -\ 6\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

9, 8, 7, 6

$\frac{\begin{array}[b]{r}9\\ -\ 6\end{array}}{ \ \ \ \space 3}$

Report an Error

Example Question #67 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}7\\ -\ 1\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

7,6

$\frac{\begin{array}[b]{r}7\\ -\ 1\end{array}}{ \ \ \ \space 6}$

Report an Error

Example Question #68 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}20\\ -\ 3\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

20,19,18,17

$\frac{\begin{array}[b]{r}20\\ -\ 3\end{array}}{ \ \ \space 17}$

Report an Error

Example Question #69 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}20\\ -\ 19\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1

$\frac{\begin{array}[b]{r}20\\ -\ 19\end{array}}{ \ \ \ \ \ \space 1}$

Report an Error

Example Question #70 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}19\\ -\ 7\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

19, 18, 17, 16, 15, 14, 13, 12

$\frac{\begin{array}[b]{r}19\\ -\ 7\end{array}}{ \ \ \space 12}$

Report an Error

Example Question #161 : Operations & Algebraic Thinking

$\frac{\begin{array}[b]{r}19\\ -\ 19\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0

$\frac{\begin{array}[b]{r}19\\ -\ 19\end{array}}{ \ \ \ \space 0}$

Report an Error

Example Question #72 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}18\\ -\ 8\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

18, 17, 16, 15, 14, 13, 12, 11, 10

$\frac{\begin{array}[b]{r}18\\ -\ 8\end{array}}{ \ \ \space 10}$

Report an Error

Example Question #73 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}17\\ -\ 4\end{array}}{ \ \ \ \space ?}$

Possible Answers:

Correct answer:

Explanation:

To subtract we can count backwards. Start at and count back .

17, 16, 15, 14, 13

$\frac{\begin{array}[b]{r}17\\ -\ 4\end{array}}{ \ \ \space 13}$

Report an Error

View Tutors

Tara
Certified Tutor

City College of New York-CUNY School of Medicine, Bachelors, B.S./M.D. program at Sophie Davis School, Psychology minor.

View Tutors

Richard
Certified Tutor

Emory University, Bachelors, Biology and Spanish. Northwestern University, PHD, Biology and Public Health.

View Tutors

Ruth
Certified Tutor

University of Chicago, Bachelor in Arts, English Lang./Lit. and Theatre and Performance Studies.

All Common Core: 1st Grade Math Resources

7 Diagnostic Tests 180 Practice Tests Question of the Day Flashcards Learn by Concept

Popular Subjects

SAT Tutors in Denver, SSAT Tutors in New York City, Math Tutors in Seattle, Computer Science Tutors in San Diego, Statistics Tutors in San Francisco-Bay Area, Physics Tutors in New York City, Chemistry Tutors in Boston, GMAT Tutors in Houston, SAT Tutors in New York City, French Tutors in Los Angeles

Popular Courses & Classes

MCAT Courses & Classes in Chicago, SSAT Courses & Classes in Miami, MCAT Courses & Classes in Boston, GMAT Courses & Classes in Los Angeles, MCAT Courses & Classes in Atlanta, Spanish Courses & Classes in Philadelphia, LSAT Courses & Classes in Los Angeles, SSAT Courses & Classes in Atlanta, ISEE Courses & Classes in Philadelphia, SAT Courses & Classes in New York City

Popular Test Prep

SAT Test Prep in Miami, SSAT Test Prep in Chicago, GRE Test Prep in Washington DC, MCAT Test Prep in Houston, LSAT Test Prep in Denver, GMAT Test Prep in Miami, ACT Test Prep in San Diego, GMAT Test Prep in San Diego, LSAT Test Prep in Los Angeles, ISEE Test Prep in Phoenix

DMCA Complaint

If you believe that content available by means of the Website (as defined in our Terms of Service) infringes one or more of your copyrights, please notify us by providing a written notice (“Infringement Notice”) containing the information described below to the designated agent listed below. If Varsity Tutors takes action in response to an Infringement Notice, it will make a good faith attempt to contact the party that made such content available by means of the most recent email address, if any, provided by such party to Varsity Tutors.

Your Infringement Notice may be forwarded to the party that made the content available or to third parties such as ChillingEffects.org.

Please be advised that you will be liable for damages (including costs and attorneys’ fees) if you materially misrepresent that a product or activity is infringing your copyrights. Thus, if you are not sure content located on or linked-to by the Website infringes your copyright, you should consider first contacting an attorney.

Please follow these steps to file a notice:

You must include the following:

A physical or electronic signature of the copyright owner or a person authorized to act on their behalf; An identification of the copyright claimed to have been infringed; A description of the nature and exact location of the content that you claim to infringe your copyright, in \ sufficient detail to permit Varsity Tutors to find and positively identify that content; for example we require a link to the specific question (not just the name of the question) that contains the content and a description of which specific portion of the question – an image, a link, the text, etc – your complaint refers to; Your name, address, telephone number and email address; and A statement by you: (a) that you believe in good faith that the use of the content that you claim to infringe your copyright is not authorized by law, or by the copyright owner or such owner’s agent; (b) that all of the information contained in your Infringement Notice is accurate, and (c) under penalty of perjury, that you are either the copyright owner or a person authorized to act on their behalf.

Send your complaint to our designated agent at:

Charles Cohn Varsity Tutors LLC
101 S. Hanley Rd, Suite 300
St. Louis, MO 63105

Or fill out the form below:

Do not fill in this field

Contact Information

* Full legal name

Company name

* Phone number

* Email address

Address

* Address1

Address2

* City

* State

* Zipcode

* Country

Complaint Details

* URL of copyrighted work (where your original material is located)

* Please describe the copyrighted work so that it may be easily identified

I am the owner, or an agent authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.

I have a good faith belief that the use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law.

This notification is accurate.

I acknowledge that there may be adverse legal consequences for making false or bad faith allegations of copyright infringement by using this process.

* Signature (your digital signature is legally binding)

HIGH SCHOOL

GRADUATE SCHOOL

K-8

Search 50+ Tests

math tutoring

science tutoring

foreign languages

elementary tutoring

other

Search 350+ Subjects

Common Core: 1st Grade Math : Operations & Algebraic Thinking

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

All Common Core: 1st Grade Math Resources

Example Questions

Example Question #64 : Adding And Subtracting Within 20

Example Question #65 : Adding And Subtracting Within 20

Example Question #66 : Adding And Subtracting Within 20

Example Question #67 : Adding And Subtracting Within 20

Example Question #68 : Adding And Subtracting Within 20

Example Question #69 : Adding And Subtracting Within 20

Example Question #70 : Adding And Subtracting Within 20

Example Question #161 : Operations & Algebraic Thinking

Example Question #72 : Adding And Subtracting Within 20

Example Question #73 : Adding And Subtracting Within 20

All Common Core: 1st Grade Math Resources

Report an issue with this question

DMCA Complaint

Contact Information

Address

Complaint Details

Email address:
Your name:
Feedback: