Call Now to Set Up Tutoring:

(888) 888-0446

Common Core: 1st Grade Math : Adding and Subtracting Within 20

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 #111 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}3\\ -\ 2\end{array}}{ \ \ \ \ \space ?}$ $\displaystyle \frac{\begin{array}[b]{r}3\\ -\ 2\end{array}}{ \ \ \ \ \space ?}$

Possible Answers:

$\displaystyle 3$

$\displaystyle 2$

$\displaystyle 0$

$\displaystyle 4$

$\displaystyle 1$

Correct answer:

$\displaystyle 1$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 3$ and count back $\displaystyle 2$.

3,2,1 $\displaystyle 3,2,1$

$\frac{\begin{array}[b]{r}3\\ -\ 2\end{array}}{ \ \ \ \ \space 1}$ $\displaystyle \frac{\begin{array}[b]{r}3\\ -\ 2\end{array}}{ \ \ \ \ \space 1}$

Report an Error

Example Question #112 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}18\\ -\ 4\end{array}}{ \ \ \ \ \ \space ?}$ $\displaystyle \frac{\begin{array}[b]{r}18\\ -\ 4\end{array}}{ \ \ \ \ \ \space ?}$

Possible Answers:

$\displaystyle 12$

$\displaystyle 11$

$\displaystyle 13$

$\displaystyle 14$

$\displaystyle 10$

Correct answer:

$\displaystyle 14$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 18$ and count back $\displaystyle 4$.

$\displaystyle 18,17,16,15,14$

$\frac{\begin{array}[b]{r}18\\ -\ 4\end{array}}{ \ \ \ \space 14}$ $\displaystyle \frac{\begin{array}[b]{r}18\\ -\ 4\end{array}}{ \ \ \ \space 14}$

Report an Error

Example Question #113 : Adding And Subtracting Within 20

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

Possible Answers:

$\displaystyle 1$

$\displaystyle 3$

$\displaystyle 2$

$\displaystyle 4$

$\displaystyle 0$

Correct answer:

$\displaystyle 0$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 20$ and count back $\displaystyle 20$.

$\displaystyle 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0$

$\frac{\begin{array}[b]{r}20\\ -\ 20\end{array}}{ \ \ \ \ \space 0}$ $\displaystyle \frac{\begin{array}[b]{r}20\\ -\ 20\end{array}}{ \ \ \ \ \space 0}$

Report an Error

Example Question #111 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}19\\ -\ 11\end{array}}{ \ \ \ \ \space ?}$ $\displaystyle \frac{\begin{array}[b]{r}19\\ -\ 11\end{array}}{ \ \ \ \ \space ?}$

Possible Answers:

$\displaystyle 5$

$\displaystyle 6$

$\displaystyle 4$

$\displaystyle 7$

$\displaystyle 8$

Correct answer:

$\displaystyle 8$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 19$ and count back $\displaystyle 11$.

$\displaystyle 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8$

$\frac{\begin{array}[b]{r}19\\ -\ 11\end{array}}{ \ \ \ \ \space 8}$ $\displaystyle \frac{\begin{array}[b]{r}19\\ -\ 11\end{array}}{ \ \ \ \ \space 8}$

Report an Error

Example Question #112 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}18\\ -\ 15\end{array}}{ \ \ \ \ \space ?}$ $\displaystyle \frac{\begin{array}[b]{r}18\\ -\ 15\end{array}}{ \ \ \ \ \space ?}$

Possible Answers:

$\displaystyle 6$

$\displaystyle 3$

$\displaystyle 5$

$\displaystyle 2$

$\displaystyle 4$

Correct answer:

$\displaystyle 3$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 18$ and count back $\displaystyle 15$.

$\displaystyle 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3$

$\frac{\begin{array}[b]{r}18\\ -\ 15\end{array}}{ \ \ \ \ \ \space 3}$ $\displaystyle \frac{\begin{array}[b]{r}18\\ -\ 15\end{array}}{ \ \ \ \ \ \space 3}$

Report an Error

Example Question #113 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}17\\ -\ 10\end{array}}{ \ \ \ \ \space ?}$ $\displaystyle \frac{\begin{array}[b]{r}17\\ -\ 10\end{array}}{ \ \ \ \ \space ?}$

Possible Answers:

$\displaystyle 8$

$\displaystyle 7$

$\displaystyle 4$

$\displaystyle 6$

$\displaystyle 5$

Correct answer:

$\displaystyle 7$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 17$ and count back $\displaystyle 10$.

$\displaystyle 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7$

$\frac{\begin{array}[b]{r}17\\ -\ 10\end{array}}{ \ \ \ \ \ \space 7}$ $\displaystyle \frac{\begin{array}[b]{r}17\\ -\ 10\end{array}}{ \ \ \ \ \ \space 7}$

Report an Error

Example Question #211 : Common Core Math: Grade 1

$\frac{\begin{array}[b]{r}16\\ -\ 12\end{array}}{ \ \ \ \ \space ?}$ $\displaystyle \frac{\begin{array}[b]{r}16\\ -\ 12\end{array}}{ \ \ \ \ \space ?}$

Possible Answers:

$\displaystyle 5$

$\displaystyle 4$

$\displaystyle 2$

$\displaystyle 6$

$\displaystyle 3$

Correct answer:

$\displaystyle 4$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 16$ and count back $\displaystyle 12$.

$\displaystyle 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4$

$\frac{\begin{array}[b]{r}16\\ -\ 12\end{array}}{ \ \ \ \ \ \space 4}$ $\displaystyle \frac{\begin{array}[b]{r}16\\ -\ 12\end{array}}{ \ \ \ \ \ \space 4}$

Report an Error

Example Question #115 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}14\\ -\ 3\end{array}}{ \ \ \ \ \space ?}$ $\displaystyle \frac{\begin{array}[b]{r}14\\ -\ 3\end{array}}{ \ \ \ \ \space ?}$

Possible Answers:

$\displaystyle 9$

$\displaystyle 11$

$\displaystyle 7$

$\displaystyle 8$

$\displaystyle 10$

Correct answer:

$\displaystyle 11$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 14$ and count back $\displaystyle 3$.

$\displaystyle 14,13,12,11$

$\frac{\begin{array}[b]{r}14\\ -\ 3\end{array}}{ \ \ \space 11}$ $\displaystyle \frac{\begin{array}[b]{r}14\\ -\ 3\end{array}}{ \ \ \space 11}$

Report an Error

Example Question #116 : Adding And Subtracting Within 20

$\frac{\begin{array}[b]{r}11\\ -\ 7\end{array}}{ \ \ \ \ \space ?}$ $\displaystyle \frac{\begin{array}[b]{r}11\\ -\ 7\end{array}}{ \ \ \ \ \space ?}$

Possible Answers:

$\displaystyle 4$

$\displaystyle 6$

$\displaystyle 5$

$\displaystyle 7$

$\displaystyle 8$

Correct answer:

$\displaystyle 4$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 11$ and count back $\displaystyle 7$.

$\displaystyle 11, 10, 9, 8, 7, 6, 5, 4$

$\frac{\begin{array}[b]{r}11\\ -\ 7\end{array}}{ \ \ \ \space 4}$ $\displaystyle \frac{\begin{array}[b]{r}11\\ -\ 7\end{array}}{ \ \ \ \space 4}$

Report an Error

Example Question #117 : Adding And Subtracting Within 20

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

Possible Answers:

$\displaystyle 5$

$\displaystyle 9$

$\displaystyle 6$

$\displaystyle 7$

$\displaystyle 8$

Correct answer:

$\displaystyle 6$

Explanation:

To subtract we can count backwards. Start at $\displaystyle 8$ and count back $\displaystyle 2$.

8,7,6 $\displaystyle 8,7,6$

$\frac{\begin{array}[b]{r}8\\ -\ 2\end{array}}{ \ \ \ \space 6}$ $\displaystyle \frac{\begin{array}[b]{r}8\\ -\ 2\end{array}}{ \ \ \ \space 6}$

Report an Error

View Tutors

Marlene
Certified Tutor

Herbert Lehman, Bachelors, Recreation Education. Long Island University-Brooklyn Campus, Masters, Special Education.

View Tutors

Richard
Certified Tutor

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

View Tutors

Alina
Certified Tutor

University of Virginia-Main Campus, Current Undergrad, Biochemistry.

All Common Core: 1st Grade Math Resources

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

Popular Subjects

Computer Science Tutors in Phoenix, Algebra Tutors in Denver, English Tutors in Atlanta, GRE Tutors in Chicago, Reading Tutors in New York City, Chemistry Tutors in Washington DC, Computer Science Tutors in San Francisco-Bay Area, Biology Tutors in Seattle, LSAT Tutors in Los Angeles, Biology Tutors in Atlanta

Popular Courses & Classes

ISEE Courses & Classes in New York City, LSAT Courses & Classes in Houston, ACT Courses & Classes in Phoenix, SAT Courses & Classes in Boston, Spanish Courses & Classes in Philadelphia, MCAT Courses & Classes in Miami, LSAT Courses & Classes in Chicago, GMAT Courses & Classes in Philadelphia, GMAT Courses & Classes in Chicago, SAT Courses & Classes in Washington DC

Popular Test Prep

SAT Test Prep in Miami, GRE Test Prep in Los Angeles, MCAT Test Prep in San Diego, GRE Test Prep in Washington DC, ISEE Test Prep in Miami, ACT Test Prep in Dallas Fort Worth, MCAT Test Prep in Los Angeles, SSAT Test Prep in Washington DC, LSAT Test Prep in Boston, SSAT Test Prep in Los Angeles

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 : Adding and Subtracting Within 20

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

All Common Core: 1st Grade Math Resources

Example Questions

Example Question #111 : Adding And Subtracting Within 20

Example Question #112 : Adding And Subtracting Within 20

Example Question #113 : Adding And Subtracting Within 20

Example Question #111 : Adding And Subtracting Within 20

Example Question #112 : Adding And Subtracting Within 20

Example Question #113 : Adding And Subtracting Within 20

Example Question #211 : Common Core Math: Grade 1

Example Question #115 : Adding And Subtracting Within 20

Example Question #116 : Adding And Subtracting Within 20

Example Question #117 : 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: