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 #32 : Count Within 1000 By 1s, 5s, 10s, And 100s, Ccss.Math.Content.2.Nbt.A.2

When counting by \(\displaystyle 10\)s, what number comes after \(\displaystyle 30?\)

 

Possible Answers:

\(\displaystyle 30\)

\(\displaystyle 50\)

\(\displaystyle 40\)

\(\displaystyle 20\)

\(\displaystyle 60\)

Correct answer:

\(\displaystyle 40\)

Explanation:

When counting by \(\displaystyle 10\)s, we add \(\displaystyle 10\) to our previous number. 

\(\displaystyle \frac{\begin{array}[b]{r}30\\ +\ 10\end{array}}{ \ \ \ \space 40}\)

Example Question #33 : Count Within 1000 By 1s, 5s, 10s, And 100s, Ccss.Math.Content.2.Nbt.A.2

When counting by \(\displaystyle 10\)s, what number comes after \(\displaystyle 40?\)

 

Possible Answers:

\(\displaystyle 30\)

\(\displaystyle 40\)

\(\displaystyle 50\)

\(\displaystyle 20\)

\(\displaystyle 60\)

Correct answer:

\(\displaystyle 50\)

Explanation:

When counting by \(\displaystyle 10\)s, we add \(\displaystyle 10\) to our previous number. 

\(\displaystyle \frac{\begin{array}[b]{r}40\\ +\ 10\end{array}}{ \ \ \ \space 50}\)

Example Question #34 : Count Within 1000 By 1s, 5s, 10s, And 100s, Ccss.Math.Content.2.Nbt.A.2

When counting by \(\displaystyle 10\)s, what number comes after \(\displaystyle 50?\)

 

Possible Answers:

\(\displaystyle 40\)

\(\displaystyle 60\)

\(\displaystyle 30\)

\(\displaystyle 20\)

\(\displaystyle 50\)

Correct answer:

\(\displaystyle 60\)

Explanation:

When counting by \(\displaystyle 10\)s, we add \(\displaystyle 10\) to our previous number. 

\(\displaystyle \frac{\begin{array}[b]{r}50\\ +\ 10\end{array}}{ \ \ \ \space 60}\)

Example Question #35 : Count Within 1000 By 1s, 5s, 10s, And 100s, Ccss.Math.Content.2.Nbt.A.2

When counting by \(\displaystyle 10\)s, what number comes after \(\displaystyle 60?\)

 

Possible Answers:

\(\displaystyle 110\)

\(\displaystyle 80\)

\(\displaystyle 90\)

\(\displaystyle 100\)

\(\displaystyle 70\)

Correct answer:

\(\displaystyle 70\)

Explanation:

When counting by \(\displaystyle 10\)s, we add \(\displaystyle 10\) to our previous number. 

\(\displaystyle \frac{\begin{array}[b]{r}60\\ +\ 10\end{array}}{ \ \ \ \space 70}\)

Example Question #41 : Count Within 1000 By 1s, 5s, 10s, And 100s, Ccss.Math.Content.2.Nbt.A.2

When counting by \(\displaystyle 10\)s, what number comes after \(\displaystyle 70?\)

 

Possible Answers:

\(\displaystyle 90\)

\(\displaystyle 80\)

\(\displaystyle 70\)

\(\displaystyle 110\)

\(\displaystyle 100\)

Correct answer:

\(\displaystyle 80\)

Explanation:

When counting by \(\displaystyle 10\)s, we add \(\displaystyle 10\) to our previous number. 

\(\displaystyle \frac{\begin{array}[b]{r}70\\ +\ 10\end{array}}{ \ \ \ \space 80}\)

Example Question #42 : Count Within 1000 By 1s, 5s, 10s, And 100s, Ccss.Math.Content.2.Nbt.A.2

When counting by \(\displaystyle 10\)s, what number comes after \(\displaystyle 80?\)

 

Possible Answers:

\(\displaystyle 110\)

\(\displaystyle 70\)

\(\displaystyle 100\)

\(\displaystyle 80\)

\(\displaystyle 90\)

Correct answer:

\(\displaystyle 90\)

Explanation:

When counting by \(\displaystyle 10\)s, we add \(\displaystyle 10\) to our previous number. 

\(\displaystyle \frac{\begin{array}[b]{r}80\\ +\ 10\end{array}}{ \ \ \ \space 90}\)

Example Question #541 : Common Core Math: Grade 2

When counting by \(\displaystyle 10\)s, what number comes after \(\displaystyle 90?\)

 

Possible Answers:

\(\displaystyle 80\)

\(\displaystyle 70\)

\(\displaystyle 110\)

\(\displaystyle 100\)

\(\displaystyle 90\)

Correct answer:

\(\displaystyle 100\)

Explanation:

When counting by \(\displaystyle 10\)s, we add \(\displaystyle 10\) to our previous number. 

\(\displaystyle \frac{\begin{array}[b]{r}90\\ +\ 10\end{array}}{ \ \ \space 100}\)

Example Question #44 : Count Within 1000 By 1s, 5s, 10s, And 100s, Ccss.Math.Content.2.Nbt.A.2

When counting by \(\displaystyle 10\)s, what number comes after \(\displaystyle 100?\)

 

Possible Answers:

\(\displaystyle 100\)

\(\displaystyle 80\)

\(\displaystyle 70\)

\(\displaystyle 110\)

\(\displaystyle 90\)

Correct answer:

\(\displaystyle 110\)

Explanation:

When counting by \(\displaystyle 10\)s, we add \(\displaystyle 10\) to our previous number. 

\(\displaystyle \frac{\begin{array}[b]{r}100\\ +\ 10\end{array}}{ \ \ \space 110}\)

Example Question #45 : Count Within 1000 By 1s, 5s, 10s, And 100s, Ccss.Math.Content.2.Nbt.A.2

When counting by \(\displaystyle 10\)s, what number comes after \(\displaystyle 110?\)

 

Possible Answers:

\(\displaystyle 140\)

\(\displaystyle 160\)

\(\displaystyle 130\)

\(\displaystyle 150\)

\(\displaystyle 120\)

Correct answer:

\(\displaystyle 120\)

Explanation:

When counting by \(\displaystyle 10\)s, we add \(\displaystyle 10\) to our previous number. 

\(\displaystyle \frac{\begin{array}[b]{r}110\\ +\ 10\end{array}}{ \ \ \space 120}\)

Example Question #46 : Count Within 1000 By 1s, 5s, 10s, And 100s, Ccss.Math.Content.2.Nbt.A.2

When counting by \(\displaystyle 10\)s, what number comes after \(\displaystyle 120?\)

 

Possible Answers:

\(\displaystyle 160\)

\(\displaystyle 150\)

\(\displaystyle 120\)

\(\displaystyle 130\)

\(\displaystyle 140\)

Correct answer:

\(\displaystyle 130\)

Explanation:

When counting by \(\displaystyle 10\)s, we add \(\displaystyle 10\) to our previous number. 

\(\displaystyle \frac{\begin{array}[b]{r}120\\ +\ 10\end{array}}{ \ \ \space 130}\)

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