Common Core: 1st Grade Math : Adding and Subtracting Within 20: CCSS.MATH.CONTENT.1.OA.C.6

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

varsity tutors app store varsity tutors android store

Example Questions

Example Question #311 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

\(\displaystyle \frac{\begin{array}[b]{r}9\\ +\ 6\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 13\)

\(\displaystyle 11\)

\(\displaystyle 14\)

\(\displaystyle 12\)

\(\displaystyle 15\)

Correct answer:

\(\displaystyle 15\)

Explanation:

To add we count up. Start at \(\displaystyle 9\) and count up \(\displaystyle 6\).

\(\displaystyle 9,10,11,12,13,14,15\)

\(\displaystyle \frac{\begin{array}[b]{r}9\\ +\ 6\end{array}}{ \ \ \space15}\)

Example Question #2291 : Ssat Elementary Level Quantitative (Math)

\(\displaystyle \frac{\begin{array}[b]{r}10\\ +\ 7\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 17\)

\(\displaystyle 14\)

\(\displaystyle 16\)

\(\displaystyle 18\)

\(\displaystyle 15\)

Correct answer:

\(\displaystyle 17\)

Explanation:

To add we count up. Start at \(\displaystyle 10\) and count up \(\displaystyle 7\).

\(\displaystyle 10,11,12,13,14,15,16,17\)

\(\displaystyle \frac{\begin{array}[b]{r}10\\ +\ 7\end{array}}{ \ \ \space17}\)

Example Question #2292 : Ssat Elementary Level Quantitative (Math)

\(\displaystyle \frac{\begin{array}[b]{r}8\\ +\ 9\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 16\)

\(\displaystyle 17\)

\(\displaystyle 20\)

\(\displaystyle 18\)

\(\displaystyle 19\)

Correct answer:

\(\displaystyle 17\)

Explanation:

To add we count up. Start at \(\displaystyle 8\) and count up \(\displaystyle 9\).

\(\displaystyle 8,9,10,11,12,13,14,15,16,17\)

\(\displaystyle \frac{\begin{array}[b]{r}8\\ +\ 9\end{array}}{ \ \ \space17}\)

Example Question #2293 : Ssat Elementary Level Quantitative (Math)

\(\displaystyle \frac{\begin{array}[b]{r}10\\ +\ 9\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 18\)

\(\displaystyle 20\)

\(\displaystyle 16\)

\(\displaystyle 19\)

\(\displaystyle 17\)

Correct answer:

\(\displaystyle 19\)

Explanation:

To add we count up. Start at \(\displaystyle 10\) and count up \(\displaystyle 9\).

\(\displaystyle 10,11,12,13,14,15,16,17,18,19\)

\(\displaystyle \frac{\begin{array}[b]{r}10\\ +\ 9\end{array}}{ \ \ \space19}\)

Example Question #2294 : Ssat Elementary Level Quantitative (Math)

\(\displaystyle \frac{\begin{array}[b]{r}4\\ +\ 12\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 18\)

\(\displaystyle 15\)

\(\displaystyle 14\)

\(\displaystyle 17\)

\(\displaystyle 16\)

Correct answer:

\(\displaystyle 16\)

Explanation:

To add we count up. Start at \(\displaystyle 4\) and count up \(\displaystyle 12\).

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

\(\displaystyle \frac{\begin{array}[b]{r}4\\ +\ 12\end{array}}{ \ \ \ \space16}\)

Example Question #2295 : Ssat Elementary Level Quantitative (Math)

\(\displaystyle \frac{\begin{array}[b]{r}7\\ +\ 13\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 18\)

\(\displaystyle 19\)

\(\displaystyle 20\)

\(\displaystyle 16\)

\(\displaystyle 17\)

Correct answer:

\(\displaystyle 20\)

Explanation:

To add we count up. Start at \(\displaystyle 7\) and count up \(\displaystyle 13\).

\(\displaystyle 7,8,9,10,11,12,13,14,15,16,17,18,19,20\)

\(\displaystyle \frac{\begin{array}[b]{r}7\\ +\ 13\end{array}}{ \ \ \ \space20}\)

Example Question #2296 : Ssat Elementary Level Quantitative (Math)

\(\displaystyle \frac{\begin{array}[b]{r}7\\ +\ 12\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 19\)

\(\displaystyle 18\)

\(\displaystyle 16\)

\(\displaystyle 17\)

\(\displaystyle 15\)

Correct answer:

\(\displaystyle 19\)

Explanation:

To add we count up. Start at \(\displaystyle 7\) and count up \(\displaystyle 12\).

\(\displaystyle 7,8,9,10,11,12,13,14,15,16,17,18,19\)

\(\displaystyle \frac{\begin{array}[b]{r}7\\ +\ 12\end{array}}{ \ \ \space19}\)

Example Question #2297 : Ssat Elementary Level Quantitative (Math)

\(\displaystyle \frac{\begin{array}[b]{r}1\\ +\ 15\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 16\)

\(\displaystyle 19\)

\(\displaystyle 18\)

\(\displaystyle 20\)

\(\displaystyle 17\)

Correct answer:

\(\displaystyle 16\)

Explanation:

To add we count up. Start at \(\displaystyle 1\) and count up \(\displaystyle 15\).

\(\displaystyle 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16\)

\(\displaystyle \frac{\begin{array}[b]{r}1\\ +\ 15\end{array}}{ \ \ \ \space16}\)

Example Question #2298 : Ssat Elementary Level Quantitative (Math)

\(\displaystyle \frac{\begin{array}[b]{r}4\\ +\ 14\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 17\)

\(\displaystyle 19\)

\(\displaystyle 18\)

\(\displaystyle 15\)

\(\displaystyle 16\)

Correct answer:

\(\displaystyle 18\)

Explanation:

To add we count up. Start at \(\displaystyle 4\) and count up \(\displaystyle 14\).

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

\(\displaystyle \frac{\begin{array}[b]{r}4\\ +\ 14\end{array}}{ \ \ \ \space18}\)

Example Question #2299 : Ssat Elementary Level Quantitative (Math)

\(\displaystyle \frac{\begin{array}[b]{r}2\\ +\ 17\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 18\)

\(\displaystyle 17\)

\(\displaystyle 19\)

\(\displaystyle 16\)

\(\displaystyle 20\)

Correct answer:

\(\displaystyle 19\)

Explanation:

To add we count up. Start at \(\displaystyle 2\) and count up \(\displaystyle 17\).

\(\displaystyle 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19\)

\(\displaystyle \frac{\begin{array}[b]{r}2\\ +\ 17\end{array}}{ \ \ \ \space19}\)

Learning Tools by Varsity Tutors