SSAT Elementary Level Math : Operations

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

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Example Questions

Example Question #831 : Operations

Solve for x. 

45degrees

Possible Answers:

\(\displaystyle 45^\circ\)

\(\displaystyle 40^\circ\)

\(\displaystyle 35^\circ\)

\(\displaystyle 50^\circ\)

\(\displaystyle 30^\circ\)

Correct answer:

\(\displaystyle 45^\circ\)

Explanation:

Because of the square in the corner of the angle we have a \(\displaystyle 90^\circ\) angle. To find the missing piece of the angle we subtract. 

\(\displaystyle 90-45=45\)

Example Question #13 : Geometric Measurement: Understand Concepts Of Angle And Measure Angles

Solve for x. 

52degrees

Possible Answers:

\(\displaystyle 32^\circ\)

\(\displaystyle 36^\circ\)

\(\displaystyle 34^\circ\)

\(\displaystyle 30^\circ\)

\(\displaystyle 38^\circ\)

Correct answer:

\(\displaystyle 38^\circ\)

Explanation:

To solve for x we subtract. 

\(\displaystyle 90-52=38\)

Example Question #14 : Geometric Measurement: Understand Concepts Of Angle And Measure Angles

Solve for x. 

75degrees

Possible Answers:

\(\displaystyle 55^\circ\)

\(\displaystyle 40^\circ\)

\(\displaystyle 45^\circ\)

\(\displaystyle 60^\circ\)

\(\displaystyle 50^\circ\)

Correct answer:

\(\displaystyle 50^\circ\)

Explanation:

To solve for x we subtract. 

\(\displaystyle 75-25=50\)

Example Question #21 : Geometric Measurement: Understand Concepts Of Angle And Measure Angles

If we wanted to make this angle into a right angle, how many more degrees would we need to add? 

27degrees

Possible Answers:

\(\displaystyle 67^\circ\)

\(\displaystyle 65^\circ\)

\(\displaystyle 64^\circ\)

\(\displaystyle 66^\circ\)

\(\displaystyle 63^\circ\)

Correct answer:

\(\displaystyle 63^\circ\)

Explanation:

A right angle has a measurement of \(\displaystyle 90^\circ\). To find how much more we would need to add we subtract. 

\(\displaystyle 90-27=63\)

Example Question #834 : How To Subtract

Simplify the below: 

\(\displaystyle a - a + b + b\)

Possible Answers:

\(\displaystyle 2a - 2b\)

\(\displaystyle 2a\)

\(\displaystyle 2b\)

\(\displaystyle 2a + 2b\)

Correct answer:

\(\displaystyle 2b\)

Explanation:

In order to simplify: \(\displaystyle a - a + b + b\)

We must gather the things that are the alike together. 

Since we have an "a" and then we subtract an "a" there are no more a's left, so we should not have any a's in our answer. 

Since we have a "b" added to another "b", we can see that we get \(\displaystyle 2b\) when we add those together. 

So the final answer becomes \(\displaystyle 2b\)

Example Question #833 : How To Subtract

Elise had 12 hair clips, but she always took them out throughout the day and would often forget where they were. After three weeks, she realized she only had 5 hair clips left. How many did she lose? 

Possible Answers:

\(\displaystyle 7\)

\(\displaystyle 8\)

\(\displaystyle 5\)

\(\displaystyle 6\)

\(\displaystyle 4\)

Correct answer:

\(\displaystyle 7\)

Explanation:

If Elise started with 12 hair clips and ended with only 5, she lost 7. \(\displaystyle 12-5=7\) If you need to visualize it, you can draw 12 marks and cross out 5. Count the ones that are left. 

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Example Question #831 : How To Subtract

Tim’s soccer team has \(\displaystyle 18\) boys on the team. \(\displaystyle 5\) of them did not come to practice. How many did come to practice? 

Possible Answers:

\(\displaystyle 12\)

\(\displaystyle 15\)

\(\displaystyle 13\)

\(\displaystyle 11\)

\(\displaystyle 14\)

Correct answer:

\(\displaystyle 13\)

Explanation:

This is a subtraction problem because people did not show up for practice, so there will be less people at practice than if everyone had shown up. 

We can start at \(\displaystyle 18\) and count back \(\displaystyle 5\).

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

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

Example Question #832 : How To Subtract

 Tiffany bought \(\displaystyle 11\) balloons. On the way to the car, \(\displaystyle 4\) blew away. How many does she have left? 

Possible Answers:

\(\displaystyle 8\)

\(\displaystyle 6\)

\(\displaystyle 9\)

\(\displaystyle 5\)

\(\displaystyle 7\)

Correct answer:

\(\displaystyle 7\)

Explanation:

This is a subtraction problem because Tiffany lost balloons so she will have less than what she started with. 

We can start at \(\displaystyle 11\) and count back \(\displaystyle 4\).

\(\displaystyle 11,10,9,8,7\)

\(\displaystyle \frac{\begin{array}[b]{r}11\\ -\ 4\end{array}}{ \ \ \ \space 7}\)

Example Question #7 : Using Subtraction Within 100 To Solve Word Problems

Joe has \(\displaystyle 70\) total math problems to complete for homework this week. He wants to get \(\displaystyle 25\) done today. How many will he have left after today? 

Possible Answers:

\(\displaystyle 46\)

\(\displaystyle 45\)

\(\displaystyle 47\)

\(\displaystyle 48\)

\(\displaystyle 44\)

Correct answer:

\(\displaystyle 45\)

Explanation:

This is a subtraction problem because we want to know how many homework problems Joe will have left after he completes some of them. We take the total number of problems that he has and subtract the number that he plans to do tonight. \(\displaystyle 70-25=45\)

Example Question #1 : Mentally Add And Subtract Within 20: Ccss.Math.Content.2.Oa.B.2

Solve the following: 

\(\displaystyle \frac{\begin{array}[b]{r}16\\ -\ 14\end{array}}{ \ \ \ \space}\)

Possible Answers:

\(\displaystyle 4\)

\(\displaystyle 2\)

\(\displaystyle 5\)

\(\displaystyle 3\)

\(\displaystyle 6\)

Correct answer:

\(\displaystyle 2\)

Explanation:

To subtract we can count backwards. Start at \(\displaystyle 16\) and count back \(\displaystyle 14.\)

\(\displaystyle 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2\)

\(\displaystyle \frac{\begin{array}[b]{r}16\\ -\ 14\end{array}}{ \ \ \ \ \ \space2}\)

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