ISEE Middle Level Quantitative : How to multiply variables

Study concepts, example questions & explanations for ISEE Middle Level Quantitative

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Example Questions

Example Question #2 : Multiply One Digit Numbers By Multiples Of 10: Ccss.Math.Content.3.Nbt.A.3

\displaystyle \frac{\begin{array}[b]{r}90\\ \times\ 9\end{array}}{ \ \ \ \space}

 

Possible Answers:

\displaystyle 99

\displaystyle 81

\displaystyle 810

\displaystyle 900

\displaystyle 90

Correct answer:

\displaystyle 810

Explanation:

To solve this problem, we multiply \displaystyle 9 by the ones position and the tens position. 

\displaystyle 9\times0=0

\displaystyle 9\times9=81

\displaystyle \frac{\begin{array}[b]{r}90\\ \times\ 9\end{array}}{ \ \space810}

Example Question #3 : Multiply One Digit Numbers By Multiples Of 10: Ccss.Math.Content.3.Nbt.A.3

\displaystyle \frac{\begin{array}[b]{r}20\\ \times\ 1\end{array}}{ \ \ \ \space}

 

Possible Answers:

\displaystyle 20

\displaystyle 10

\displaystyle 2

\displaystyle 25

\displaystyle 15

Correct answer:

\displaystyle 20

Explanation:

To solve this problem, we multiply \displaystyle 1 by the ones position and the tens position. 

\displaystyle 1\times0=0

\displaystyle 1\times2=2

\displaystyle \frac{\begin{array}[b]{r}20\\ \times\ 1\end{array}}{ \ \ \space20}

Example Question #4 : Multiply One Digit Numbers By Multiples Of 10: Ccss.Math.Content.3.Nbt.A.3

\displaystyle \frac{\begin{array}[b]{r}30\\ \times\ 2\end{array}}{ \ \ \ \space}

 

Possible Answers:

\displaystyle 30

\displaystyle 60

\displaystyle 80

\displaystyle 70

\displaystyle 50

Correct answer:

\displaystyle 60

Explanation:

To solve this problem, we multiply \displaystyle 2 by the ones position and the tens position. 

\displaystyle 2\times0=0

\displaystyle 2\times3=6

\displaystyle \frac{\begin{array}[b]{r}30\\ \times\ 2\end{array}}{ \ \ \space60}

Example Question #21 : How To Multiply Variables

\displaystyle \frac{\begin{array}[b]{r}40\\ \times\ 3\end{array}}{ \ \ \ \space}

 

Possible Answers:

\displaystyle 110

\displaystyle 90

\displaystyle 80

\displaystyle 70

\displaystyle 120

Correct answer:

\displaystyle 120

Explanation:

To solve this problem, we multiply \displaystyle 3 by the ones position and the tens position. 

\displaystyle 3\times0=0

\displaystyle 3\times4=12

\displaystyle \frac{\begin{array}[b]{r}40\\ \times\ 3\end{array}}{ \ \space120}

Example Question #51 : Isee Middle Level (Grades 7 8) Quantitative Reasoning

\displaystyle \frac{\begin{array}[b]{r}50\\ \times\ 4\end{array}}{ \ \ \ \space}

 

Possible Answers:

\displaystyle 150

\displaystyle 200

\displaystyle 220

\displaystyle 170

\displaystyle 210

Correct answer:

\displaystyle 200

Explanation:

To solve this problem, we multiply \displaystyle 4 by the ones position and the tens position. 

\displaystyle 4\times0=0

\displaystyle 4\times5=20

\displaystyle \frac{\begin{array}[b]{r}50\\ \times\ 4\end{array}}{ \ \space200}

Example Question #901 : Common Core Math: Grade 3

\displaystyle \frac{\begin{array}[b]{r}60\\ \times\ 5\end{array}}{ \ \ \ \space}

 

Possible Answers:

\displaystyle 150

\displaystyle 300

\displaystyle 350

\displaystyle 200

\displaystyle 250

Correct answer:

\displaystyle 300

Explanation:

To solve this problem, we multiply \displaystyle 5 by the ones position and the tens position. 

\displaystyle 5\times0=0

\displaystyle 5\times6=30

\displaystyle \frac{\begin{array}[b]{r}60\\ \times\ 5\end{array}}{ \ \space300}

Example Question #102 : Understanding Place Value And Properties Of Operations For Multi Digit Arithmetic

\displaystyle \frac{\begin{array}[b]{r}70\\ \times\ 6\end{array}}{ \ \ \ \space}

 

Possible Answers:

\displaystyle 380

\displaystyle 360

\displaystyle 480

\displaystyle 420

\displaystyle 400

Correct answer:

\displaystyle 420

Explanation:

To solve this problem, we multiply \displaystyle 6 by the ones position and the tens position. 

\displaystyle 6\times0=0

\displaystyle 6\times7=42

\displaystyle \frac{\begin{array}[b]{r}70\\ \times\ 6\end{array}}{ \ \space420}

Example Question #55 : Isee Middle Level (Grades 7 8) Quantitative Reasoning

\displaystyle \frac{\begin{array}[b]{r}80\\ \times\ 7\end{array}}{ \ \ \ \space}

 

Possible Answers:

\displaystyle 580

\displaystyle 570

\displaystyle 600

\displaystyle 590

\displaystyle 560

Correct answer:

\displaystyle 560

Explanation:

To solve this problem, we multiply \displaystyle 7 by the ones position and the tens position. 

\displaystyle 7\times0=0

\displaystyle 7\times8=56

\displaystyle \frac{\begin{array}[b]{r}80\\ \times\ 7\end{array}}{ \ \space560}

Example Question #52 : Isee Middle Level (Grades 7 8) Quantitative Reasoning

\displaystyle \frac{\begin{array}[b]{r}90\\ \times\ 8\end{array}}{ \ \ \ \space}

 

Possible Answers:

\displaystyle 720

\displaystyle 780

\displaystyle 710

\displaystyle 760

\displaystyle 740

Correct answer:

\displaystyle 720

Explanation:

To solve this problem, we multiply \displaystyle 8 by the ones position and the tens position. 

\displaystyle 8\times0=0

\displaystyle 8\times9=72

\displaystyle \frac{\begin{array}[b]{r}90\\ \times\ 8\end{array}}{ \ \space720}

Example Question #421 : How To Multiply

\displaystyle \frac{\begin{array}[b]{r}10\\ \times\ 9\end{array}}{ \ \ \ \space}

 

Possible Answers:

\displaystyle 100

\displaystyle 90

\displaystyle 70

\displaystyle 80

\displaystyle 60

Correct answer:

\displaystyle 90

Explanation:

To solve this problem, we multiply \displaystyle 9 by the ones position and the tens position. 

\displaystyle 9\times0=0

\displaystyle 9\times1=9

\displaystyle \frac{\begin{array}[b]{r}10\\ \times\ 9\end{array}}{ \ \ \space90}

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