SSAT Elementary Level Math : How to subtract

Study concepts, example questions & explanations for SSAT Elementary Level Math

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Example Questions

Example Question #51 : Adding And Subtracting Within 20

\(\displaystyle \frac{\begin{array}[b]{r}20\\ -\ 6\end{array}}{ \ \ \ \space ?}\)

Possible Answers:

\(\displaystyle 18\)

\(\displaystyle 15\)

\(\displaystyle 17\)

\(\displaystyle 14\)

\(\displaystyle 16\)

Correct answer:

\(\displaystyle 14\)

Explanation:

To subtract we can count backwards. Start at \(\displaystyle 20\) and count back \(\displaystyle 6\).

\(\displaystyle 20, 19, 18, 17, 16, 15, 14\)

\(\displaystyle \frac{\begin{array}[b]{r}20\\ -\ 6\end{array}}{ \ \ \space 14}\)

Example Question #151 : Operations & Algebraic Thinking

\(\displaystyle \frac{\begin{array}[b]{r}19\\ -\ 1\end{array}}{ \ \ \ \space ?}\)

Possible Answers:

\(\displaystyle 15\)

\(\displaystyle 19\)

\(\displaystyle 18\)

\(\displaystyle 16\)

\(\displaystyle 17\)

Correct answer:

\(\displaystyle 18\)

Explanation:

To subtract we can count backwards. Start at \(\displaystyle 19\) and count back \(\displaystyle 1\).

\(\displaystyle 19, 18\)

\(\displaystyle \frac{\begin{array}[b]{r}19\\ -\ 1\end{array}}{ \ \ \space 18}\)

Example Question #31 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

\(\displaystyle \frac{\begin{array}[b]{r}19\\ -\ 16\end{array}}{ \ \ \ \space ?}\)

Possible Answers:

\(\displaystyle 2\)

\(\displaystyle 6\)

\(\displaystyle 3\)

\(\displaystyle 5\)

\(\displaystyle 4\)

Correct answer:

\(\displaystyle 3\)

Explanation:

To subtract we can count backwards. Start at \(\displaystyle 19\) and count back \(\displaystyle 16\).

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

\(\displaystyle \frac{\begin{array}[b]{r}19\\ -\ 16\end{array}}{ \ \ \ \ \ \space 3}\)

Example Question #52 : Adding And Subtracting Within 20

\(\displaystyle \frac{\begin{array}[b]{r}18\\ -\ 6\end{array}}{ \ \ \ \space ?}\)

Possible Answers:

\(\displaystyle 10\)

\(\displaystyle 13\)

\(\displaystyle 11\)

\(\displaystyle 14\)

\(\displaystyle 12\)

Correct answer:

\(\displaystyle 12\)

Explanation:

To subtract we can count backwards. Start at \(\displaystyle 18\) and count back \(\displaystyle 6\).

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

\(\displaystyle \frac{\begin{array}[b]{r}18\\ -\ 6\end{array}}{ \ \ \ \space 12}\)

Example Question #153 : Operations & Algebraic Thinking

\(\displaystyle \frac{\begin{array}[b]{r}18\\ -\ 13\end{array}}{ \ \ \ \space ?}\)

Possible Answers:

\(\displaystyle 9\)

\(\displaystyle 5\)

\(\displaystyle 6\)

\(\displaystyle 7\)

\(\displaystyle 8\)

Correct answer:

\(\displaystyle 5\)

Explanation:

To subtract we can count backwards. Start at \(\displaystyle 18\) and count back \(\displaystyle 13\).

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

\(\displaystyle \frac{\begin{array}[b]{r}18\\ -\ 13\end{array}}{ \ \ \ \ \ \space 5}\)

Example Question #53 : Adding And Subtracting Within 20

\(\displaystyle \frac{\begin{array}[b]{r}17\\ -\ 3\end{array}}{ \ \ \ \space ?}\)

Possible Answers:

\(\displaystyle 11\)

\(\displaystyle 12\)

\(\displaystyle 14\)

\(\displaystyle 13\)

\(\displaystyle 10\)

Correct answer:

\(\displaystyle 14\)

Explanation:

To subtract we can count backwards. Start at \(\displaystyle 17\) and count back \(\displaystyle 3\).

\(\displaystyle 17,16,15,14\)

\(\displaystyle \frac{\begin{array}[b]{r}17\\ -\ 3\end{array}}{ \ \ \space 14}\)

Example Question #54 : Adding And Subtracting Within 20

\(\displaystyle \frac{\begin{array}[b]{r}16\\ -\ 4\end{array}}{ \ \ \ \space ?}\)

Possible Answers:

\(\displaystyle 13\)

\(\displaystyle 12\)

\(\displaystyle 15\)

\(\displaystyle 14\)

\(\displaystyle 16\)

Correct answer:

\(\displaystyle 12\)

Explanation:

To subtract we can count backwards. Start at \(\displaystyle 16\) and count back \(\displaystyle 4\).

\(\displaystyle 16, 15, 14, 13, 12\)

\(\displaystyle \frac{\begin{array}[b]{r}16\\ -\ 4\end{array}}{ \ \ \space 12}\)

Example Question #32 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

\(\displaystyle \frac{\begin{array}[b]{r}15\\ -\ 3\end{array}}{ \ \ \ \space ?}\)

Possible Answers:

\(\displaystyle 12\)

\(\displaystyle 11\)

\(\displaystyle 13\)

\(\displaystyle 15\)

\(\displaystyle 14\)

Correct answer:

\(\displaystyle 12\)

Explanation:

To subtract we can count backwards. Start at \(\displaystyle 15\) and count back \(\displaystyle 3\).

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

\(\displaystyle \frac{\begin{array}[b]{r}15\\ -\ 3\end{array}}{ \ \ \ \space 12}\)

Example Question #821 : Ssat Elementary Level Quantitative (Math)

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

Possible Answers:

\(\displaystyle 8\)

\(\displaystyle 10\)

\(\displaystyle 11\)

\(\displaystyle 9\)

\(\displaystyle 7\)

Correct answer:

\(\displaystyle 10\)

Explanation:

To subtract we can count backwards. Start at \(\displaystyle 14\) and count back \(\displaystyle 4\).

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

\(\displaystyle \frac{\begin{array}[b]{r}14\\ -\ 4\end{array}}{ \ \ \space 10}\)

Example Question #61 : Adding And Subtracting Within 20

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

Possible Answers:

\(\displaystyle 5\)

\(\displaystyle 6\)

\(\displaystyle 7\)

\(\displaystyle 4\)

\(\displaystyle 8\)

Correct answer:

\(\displaystyle 6\)

Explanation:

To subtract we can count backwards. Start at \(\displaystyle 13\) and count back \(\displaystyle 7\).

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

\(\displaystyle \frac{\begin{array}[b]{r}13\\ -\ 7\end{array}}{ \ \ \ \space 6}\)

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