Common Core: 2nd Grade Math : Common Core Math: Grade 2

Study concepts, example questions & explanations for Common Core: 2nd Grade Math

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Example Questions

Example Question #263 : Operations & Algebraic Thinking

\(\displaystyle \frac{\begin{array}[b]{r}12\\ +\ 3\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 12\)

\(\displaystyle 13\)

\(\displaystyle 15\)

\(\displaystyle 14\)

\(\displaystyle 16\)

Correct answer:

\(\displaystyle 15\)

Explanation:

To add we count up. Start at \(\displaystyle 12\) and count up \(\displaystyle 3\).

\(\displaystyle 12,13,14,15\)

\(\displaystyle \frac{\begin{array}[b]{r}12\\ +\ 3\end{array}}{ \ \ \space15}\)

Example Question #262 : Operations & Algebraic Thinking

\(\displaystyle \frac{\begin{array}[b]{r}3\\ +\ 4\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 6\)

\(\displaystyle 9\)

\(\displaystyle 7\)

\(\displaystyle 8\)

\(\displaystyle 10\)

Correct answer:

\(\displaystyle 7\)

Explanation:

To add we count up. Start at \(\displaystyle 3\) and count up \(\displaystyle 4\).

\(\displaystyle 3,4,5,6,7\)

\(\displaystyle \frac{\begin{array}[b]{r}3\\ +\ 4\end{array}}{ \ \ \ \space7}\)

Example Question #681 : How To Add

\(\displaystyle \frac{\begin{array}[b]{r}15\\ +\ 4\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 19\)

\(\displaystyle 18\)

\(\displaystyle 16\)

\(\displaystyle 20\)

\(\displaystyle 17\)

Correct answer:

\(\displaystyle 19\)

Explanation:

To add we count up. Start at \(\displaystyle 15\) and count up \(\displaystyle 4\).

\(\displaystyle 15,16,17,18,19\)

\(\displaystyle \frac{\begin{array}[b]{r}15\\ +\ 4\end{array}}{ \ \ \space19}\)

Example Question #1921 : Common Core Math: Grade 2

\(\displaystyle \frac{\begin{array}[b]{r}1\\ +\ 6\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 6\)

\(\displaystyle 8\)

\(\displaystyle 9\)

\(\displaystyle 7\)

\(\displaystyle 5\)

Correct answer:

\(\displaystyle 7\)

Explanation:

To add we count up. Start at \(\displaystyle 1\) and count up \(\displaystyle 6\).

\(\displaystyle 1,2,3,4,5,6,7\)

\(\displaystyle \frac{\begin{array}[b]{r}1\\ +\ 6\end{array}}{ \ \ \ \space7}\)

Example Question #1921 : Common Core Math: Grade 2

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

Possible Answers:

\(\displaystyle 15\)

\(\displaystyle 14\)

\(\displaystyle 12\)

\(\displaystyle 13\)

\(\displaystyle 16\)

Correct answer:

\(\displaystyle 16\)

Explanation:

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

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

\(\displaystyle \frac{\begin{array}[b]{r}8\\ +\ 8\end{array}}{ \ \ \space16}\)

Example Question #681 : How To Add

\(\displaystyle \frac{\begin{array}[b]{r}5\\ +\ 9\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 15\)

\(\displaystyle 14\)

\(\displaystyle 16\)

\(\displaystyle 17\)

\(\displaystyle 18\)

Correct answer:

\(\displaystyle 14\)

Explanation:

To add we count up. Start at \(\displaystyle 5\) and count up \(\displaystyle 9\).

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

\(\displaystyle \frac{\begin{array}[b]{r}5\\ +\ 9\end{array}}{ \ \ \space14}\)

Example Question #1922 : Common Core Math: Grade 2

\(\displaystyle \frac{\begin{array}[b]{r}5\\ +\ 10\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 16\)

\(\displaystyle 15\)

\(\displaystyle 13\)

\(\displaystyle 17\)

\(\displaystyle 14\)

Correct answer:

\(\displaystyle 15\)

Explanation:

To add we count up. Start at \(\displaystyle 5\) and count up \(\displaystyle 10\).

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

\(\displaystyle \frac{\begin{array}[b]{r}5\\ +\ 10\end{array}}{ \ \ \ \space15}\)

Example Question #681 : How To Add

\(\displaystyle \frac{\begin{array}[b]{r}6\\ +\ 11\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 16\)

\(\displaystyle 13\)

\(\displaystyle 15\)

\(\displaystyle 17\)

\(\displaystyle 14\)

Correct answer:

\(\displaystyle 17\)

Explanation:

To add we count up. Start at \(\displaystyle 6\) and count up \(\displaystyle 11\).

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

\(\displaystyle \frac{\begin{array}[b]{r}6\\ +\ 11\end{array}}{ \ \ \ \space17}\)

Example Question #683 : How To Add

\(\displaystyle \frac{\begin{array}[b]{r}1\\ +\ 12\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 12\)

\(\displaystyle 11\)

\(\displaystyle 10\)

\(\displaystyle 14\)

\(\displaystyle 13\)

Correct answer:

\(\displaystyle 13\)

Explanation:

To add we count up. Start at \(\displaystyle 1\) and count up \(\displaystyle 12\).

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

\(\displaystyle \frac{\begin{array}[b]{r}1\\ +\ 12\end{array}}{ \ \ \ \space13}\)

Example Question #681 : How To Add

\(\displaystyle \frac{\begin{array}[b]{r}5\\ +\ 15\end{array}}{ \ \ \space?}\)

Possible Answers:

\(\displaystyle 15\)

\(\displaystyle 5\)

\(\displaystyle 10\)

\(\displaystyle 20\)

\(\displaystyle 12\)

Correct answer:

\(\displaystyle 20\)

Explanation:

To add we count up. Start at \(\displaystyle 5\) and count up \(\displaystyle 15\).

\(\displaystyle 5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20\)

\(\displaystyle \frac{\begin{array}[b]{r}5\\ +\ 15\end{array}}{ \ \ \ \space20}\)

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