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

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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}

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