Common Core: Kindergarten Math : Number & Operations in Base Ten

Study concepts, example questions & explanations for Common Core: Kindergarten Math

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Example Questions

Example Question #11 : Number & Operations In Base Ten

\(\displaystyle 10+\) _________\(\displaystyle =12\)

 

Possible Answers:

\(\displaystyle 2\)

\(\displaystyle 1\)

\(\displaystyle 3\)

Correct answer:

\(\displaystyle 2\)

Explanation:

To find the missing piece of an addition problem, we can take the biggest number minus the smallest number. 

\(\displaystyle \frac{\begin{array}[b]{r}12\\ -\ 10\end{array}}{ \ \ \ \ \ \space 2}\)

We can start at \(\displaystyle 12\) and count back \(\displaystyle 10\).

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

Example Question #12 : Number & Operations In Base Ten

\(\displaystyle 10+\) _________\(\displaystyle =13\)

 

Possible Answers:

\(\displaystyle 3\)

\(\displaystyle 4\)

\(\displaystyle 5\)

Correct answer:

\(\displaystyle 3\)

Explanation:

To find the missing piece of an addition problem, we can take the biggest number minus the smallest number. 

\(\displaystyle \frac{\begin{array}[b]{r}13\\ -\ 10\end{array}}{ \ \ \ \ \ \space 3}\)

We can start at \(\displaystyle 13\) and count back \(\displaystyle 10\).

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

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