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 #1118 : Number & Operations In Base Ten

\(\displaystyle \frac{\begin{array}[b]{r}321\\ -\ 10\end{array}}{ \ \ \space ?}\)

Possible Answers:

\(\displaystyle 421\)

\(\displaystyle 221\)

\(\displaystyle 322\)

\(\displaystyle 331\)

\(\displaystyle 311\)

Correct answer:

\(\displaystyle 311\)

Explanation:

When subtracting any number by  \(\displaystyle 10\)the only number that will change in your answer is the tens place. 

\(\displaystyle 1-0=1\)

\(\displaystyle 2-1=1\)

\(\displaystyle 3-0=3\)

\(\displaystyle \frac{\begin{array}[b]{r}321\\ -\ 10\end{array}}{ \ \ \space 311}\)

Example Question #81 : How To Subtract

\(\displaystyle \frac{\begin{array}[b]{r}286\\ -\ 10\end{array}}{ \ \ \space ?}\)

Possible Answers:

\(\displaystyle 285\)

\(\displaystyle 296\)

\(\displaystyle 276\)

\(\displaystyle 275\)

\(\displaystyle 386\)

Correct answer:

\(\displaystyle 276\)

Explanation:

When subtracting any number by \(\displaystyle 10\) the only number that will change in your answer is the tens place. 

\(\displaystyle 6-0=6\)

\(\displaystyle 8-1=7\)

\(\displaystyle 2-0=2\)

\(\displaystyle \frac{\begin{array}[b]{r}286\\ -\ 10\end{array}}{ \ \ \space 276}\)

Example Question #301 : Ssat Elementary Level Quantitative (Math)

\(\displaystyle \frac{\begin{array}[b]{r}134\\ -\ 10\end{array}}{ \ \ \space ?}\)

Possible Answers:

\(\displaystyle 234\)

\(\displaystyle 133\)

\(\displaystyle 124\)

\(\displaystyle 224\)

\(\displaystyle 144\)

Correct answer:

\(\displaystyle 124\)

Explanation:

When subtracting any number by \(\displaystyle 10\) the only number that will change in your answer is the tens place. 

\(\displaystyle 4-0=4\)

\(\displaystyle 3-1=2\)

\(\displaystyle 1-0=1\)

\(\displaystyle \frac{\begin{array}[b]{r}134\\ -\ 10\end{array}}{ \ \ \space 124}\)

Example Question #301 : Numbers And Operations

\(\displaystyle \frac{\begin{array}[b]{r}629\\ -\ 10\end{array}}{ \ \ \space ?}\)

Possible Answers:

\(\displaystyle 628\)

\(\displaystyle 639\)

\(\displaystyle 519\)

\(\displaystyle 619\)

\(\displaystyle 529\)

Correct answer:

\(\displaystyle 619\)

Explanation:

When subtracting any number by \(\displaystyle 10\) the only number that will change in your answer is the tens place. 

\(\displaystyle 9-0=9\)

\(\displaystyle 2-1=1\)

\(\displaystyle 6-0=6\)

\(\displaystyle \frac{\begin{array}[b]{r}629\\ -\ 10\end{array}}{ \ \ \space 619}\)

Example Question #302 : Ssat Elementary Level Quantitative (Math)

\(\displaystyle \frac{\begin{array}[b]{r}741\\ -\ 10\end{array}}{ \ \ \space ?}\)

Possible Answers:

\(\displaystyle 740\)

\(\displaystyle 841\)

\(\displaystyle 751\)

\(\displaystyle 730\)

\(\displaystyle 731\)

Correct answer:

\(\displaystyle 731\)

Explanation:

When subtracting any number by \(\displaystyle 10\) the only number that will change in your answer is the tens place. 

\(\displaystyle 1-0=1\)

\(\displaystyle 4-1=3\)

\(\displaystyle 7-0=7\)

\(\displaystyle \frac{\begin{array}[b]{r}741\\ -\ 10\end{array}}{ \ \ \space 731}\)

Example Question #1122 : Number & Operations In Base Ten

\(\displaystyle \frac{\begin{array}[b]{r}812\\ -\ 10\end{array}}{ \ \ \space ?}\)

Possible Answers:

\(\displaystyle 802\)

\(\displaystyle 902\)

\(\displaystyle 912\)

\(\displaystyle 832\)

\(\displaystyle 822\)

Correct answer:

\(\displaystyle 802\)

Explanation:

When subtracting any number by \(\displaystyle 10\) the only number that will change in your answer is the tens place. 

\(\displaystyle 2-0=2\)

\(\displaystyle 1-1=0\)

\(\displaystyle 8-0=8\)

\(\displaystyle \frac{\begin{array}[b]{r}812\\ -\ 10\end{array}}{ \ \ \space 802}\)

Example Question #82 : How To Subtract

\(\displaystyle \frac{\begin{array}[b]{r}20\\ -\ 10\end{array}}{ \ \ \ \space?}\)

Possible Answers:

\(\displaystyle 11\)

\(\displaystyle 10\)

\(\displaystyle 8\)

\(\displaystyle 7\)

\(\displaystyle 9\)

Correct answer:

\(\displaystyle 10\)

Explanation:

To subtract we can count backwards. Start at \(\displaystyle 20\) and count back \(\displaystyle 10.\)

\(\displaystyle 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10\)

\(\displaystyle \frac{\begin{array}[b]{r}20\\ -\ 10\end{array}}{ \ \ \ \space10}\)

Example Question #304 : Ssat Elementary Level Quantitative (Math)

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

Possible Answers:

\(\displaystyle 4\)

\(\displaystyle 7\)

\(\displaystyle 8\)

\(\displaystyle 5\)

\(\displaystyle 6\)

Correct answer:

\(\displaystyle 6\)

Explanation:

To subtract we can count backwards. Start at \(\displaystyle 20\) and count back \(\displaystyle 14.\)

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

\(\displaystyle \frac{\begin{array}[b]{r}20\\ -\ 14\end{array}}{ \ \ \ \ \ \space6}\)

Example Question #302 : Ssat Elementary Level Quantitative (Math)

\(\displaystyle \frac{\begin{array}[b]{r}19\\ -\ 4\end{array}}{ \ \ \ \ \space?}\)

Possible Answers:

\(\displaystyle 14\)

\(\displaystyle 13\)

\(\displaystyle 5\)

\(\displaystyle 6\)

\(\displaystyle 15\)

Correct answer:

\(\displaystyle 15\)

Explanation:

To subtract we can count backwards. Start at \(\displaystyle 19\) and count back \(\displaystyle 4\).

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

\(\displaystyle \frac{\begin{array}[b]{r}19\\ -\ 4\end{array}}{ \ \ \space15}\)

Example Question #83 : How To Subtract

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

Possible Answers:

\(\displaystyle 13\)

\(\displaystyle 3\)

\(\displaystyle 16\)

\(\displaystyle 14\)

\(\displaystyle 15\)

Correct answer:

\(\displaystyle 13\)

Explanation:

To subtract we can count backwards. Start at \(\displaystyle 18\) and count back \(\displaystyle 5\).

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

\(\displaystyle \frac{\begin{array}[b]{r}18\\ -\ 5\end{array}}{ \ \ \space13}\)

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