SSAT Elementary Level Math : How to add

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

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Example Questions

Example Question #381 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

\displaystyle \frac{\begin{array}[b]{r}10\\ +\ 3\end{array}}{ \ \ \space?}

Possible Answers:

\displaystyle 13

\displaystyle 17

\displaystyle 16

\displaystyle 14

\displaystyle 15

Correct answer:

\displaystyle 13

Explanation:

To add we count up. Start at \displaystyle 10 and count up \displaystyle 3.

\displaystyle 10,11,12,13

\displaystyle \frac{\begin{array}[b]{r}10\\ +\ 3\end{array}}{ \ \ \space13}

Example Question #382 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

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

Possible Answers:

\displaystyle 19

\displaystyle 16

\displaystyle 18

\displaystyle 17

\displaystyle 20

Correct answer:

\displaystyle 20

Explanation:

To add we count up. Start at \displaystyle 17 and count up \displaystyle 3.

\displaystyle 17,18,19,20

\displaystyle \frac{\begin{array}[b]{r}17\\ +\ 3\end{array}}{ \ \ \space20}

Example Question #383 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

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

Possible Answers:

\displaystyle 15

\displaystyle 14

\displaystyle 17

\displaystyle 18

\displaystyle 16

Correct answer:

\displaystyle 18

Explanation:

To add we count up. Start at \displaystyle 3 and count up \displaystyle 15

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

\displaystyle \frac{\begin{array}[b]{r}3\\ +\ 15\end{array}}{ \ \ \ \space18}

Example Question #384 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

\displaystyle \frac{\begin{array}[b]{r}8\\ +\ 4\end{array}}{ \ \ \space?}

Possible Answers:

\displaystyle 8

\displaystyle 11

\displaystyle 10

\displaystyle 12

\displaystyle 9

Correct answer:

\displaystyle 12

Explanation:

To add we count up. Start at \displaystyle 8 and count up \displaystyle 4.

\displaystyle 8,9,10,11,12

\displaystyle \frac{\begin{array}[b]{r}8\\ +\ 4\end{array}}{ \ \ \space12}

Example Question #385 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

\displaystyle \frac{\begin{array}[b]{r}8\\ +\ 4\end{array}}{ \ \ \space?}

Possible Answers:

\displaystyle 10

\displaystyle 8

\displaystyle 12

\displaystyle 9

\displaystyle 11

Correct answer:

\displaystyle 12

Explanation:

To add we count up. Start at \displaystyle 8 and count up \displaystyle 4.

\displaystyle 8,9,10,11,12

\displaystyle \frac{\begin{array}[b]{r}8\\ +\ 4\end{array}}{ \ \ \space12}

Example Question #386 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

\displaystyle \frac{\begin{array}[b]{r}15\\ +\ 5\end{array}}{ \ \ \space?}

Possible Answers:

\displaystyle 16

\displaystyle 17

\displaystyle 18

\displaystyle 20

\displaystyle 19

Correct answer:

\displaystyle 20

Explanation:

To add we count up. Start at \displaystyle 15 and count up \displaystyle 5.

\displaystyle 15,16,17,18,19,20

\displaystyle \frac{\begin{array}[b]{r}15\\ +\ 5\end{array}}{ \ \ \space20}

Example Question #387 : Adding And Subtracting Within 20: Ccss.Math.Content.1.Oa.C.6

\displaystyle \frac{\begin{array}[b]{r}8\\ +\ 5\end{array}}{ \ \ \space?}

Possible Answers:

\displaystyle 14

\displaystyle 13

\displaystyle 12

\displaystyle 15

\displaystyle 11

Correct answer:

\displaystyle 13

Explanation:

To add we count up. Start at \displaystyle 8 and count up \displaystyle 5.

\displaystyle 8,9,10,11,12,13

\displaystyle \frac{\begin{array}[b]{r}8\\ +\ 5\end{array}}{ \ \ \space13}

Example Question #1 : Add And Subtract 10 To Two Digit Numbers: Ccss.Math.Content.1.Nbt.C.5

\displaystyle \frac{\begin{array}[b]{r}15\\ +\ 10\end{array}}{ \ \ \space}

Possible Answers:

\displaystyle 35

\displaystyle 30

\displaystyle 5

\displaystyle 10

\displaystyle 25

Correct answer:

\displaystyle 25

Explanation:

When we add \displaystyle 10 to a two digit number, the only number that changes in our answer is the tens position, and it will always go up by \displaystyle 1. Mentally, we can add \displaystyle 1 to the number in the tens place to find our answer. 

\displaystyle 1+1=2

\displaystyle \frac{\begin{array}[b]{r}15\\ +\ 10\end{array}}{ \ \ \ \ \space25}

Example Question #11 : Place Value And Properties Of Operations To Add And Subtract

\displaystyle \frac{\begin{array}[b]{r}10\\ +\ 10\end{array}}{ \ \ \space}

 

Possible Answers:

\displaystyle 10

\displaystyle 20

\displaystyle 5

\displaystyle 0

\displaystyle 30

Correct answer:

\displaystyle 20

Explanation:

When we add \displaystyle 10 to a two digit number, the only number that changes in our answer is the tens position, and it will always go up by \displaystyle 1. Mentally, we can add \displaystyle 1 to the number in the tens place to find our answer. 

\displaystyle 1+1=2

\displaystyle \frac{\begin{array}[b]{r}10\\ +\ 10\end{array}}{ \ \ \ \space20}

Example Question #12 : Place Value And Properties Of Operations To Add And Subtract

\displaystyle \frac{\begin{array}[b]{r}20\\ +\ 10\end{array}}{ \ \ \space}

 

Possible Answers:

\displaystyle 30

\displaystyle 15

\displaystyle 10

\displaystyle 40

\displaystyle 5

Correct answer:

\displaystyle 30

Explanation:

When we add \displaystyle 10 to a two digit number, the only number that changes in our answer is the tens position, and it will always go up by \displaystyle 1. Mentally, we can add \displaystyle 1 to the number in the tens place to find our answer. 

\displaystyle 2+1=3

\displaystyle \frac{\begin{array}[b]{r}20\\ +\ 10\end{array}}{ \ \ \ \space30}

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