ISEE Middle Level Quantitative : How to multiply

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

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Example Questions

Example Question #10 : Use Place Value Understanding And Properties Of Operations To Perform Multi Digit Arithmetic

Solve:

Possible Answers:

Correct answer:

Explanation:

We can make a rectangular array using squares to help us solve this problem. Our multiplication problem is ; therefore, the rectangular array should have  squares across the top row and  squares down the first column. The rectangular array should look like the image below:

Screen shot 2016 05 18 at 2.05.45 pm

We can count the squares to find our answer. The correct answer is is 

In order to solve this problem using multiplication, we must multiply the multiplier by each digit of the multiplicand to get the answer, which is called the product.

For this problem,  is the multiplier and  is the multiplicand. 

First, we multiply  and 

Because the product is greater than , we carry the  and add it to the next product. 

Next, we multiply  and  and then add the  we carried. 

 

Example Question #11 : Use Place Value Understanding And Properties Of Operations To Perform Multi Digit Arithmetic

Solve:

Possible Answers:

Correct answer:

Explanation:

We can make a rectangular array using squares to help us solve this problem. Our multiplication problem is ; therefore, the rectangular array should have  squares across the top row and  squares down the first column. The rectangular array should look like the image below:

Screen shot 2016 05 18 at 2.15.20 pm

We can count the squares to find our answer. The correct answer is is 

In order to solve this problem using multiplication, we must multiply the multiplier by each digit of the multiplicand to get the answer, which is called the product.

For this problem,  is the multiplier and  is the multiplicand. 

First, we multiply  and 

Next, we multiply  and 

 

Example Question #1 : Multiply Or Divide To Solve Word Problems Involving Multiplicative Comparison: Ccss.Math.Content.4.Oa.A.2

It takes Hannah  minutes to get dressed in the morning. It takes her older sister, Sara,  times as long. How long does it take Sara to get dressed?

Possible Answers:

Correct answer:

Explanation:

The phrase " times as long" tells you that we are going to multiply by 

Let's have  represent how long it takes Sara to get dressed. 

Think:  minutes 4 times would be how many minutes? 

Screen shot 2015 10 06 at 9.26.54 am

Example Question #311 : Numbers And Operations

It takes Charlie  minutes to get dressed in the morning. It takes her older sister, Alison,  times as long. How long does it take Alison to get dressed? 

 

Possible Answers:

Correct answer:

Explanation:

The phrase " times as long" tells you that we are going to multiply by 

Let's have  represent how long it takes Alison to get dressed. 

Think:  minutes  times would be how many minutes? 

Screen shot 2015 10 06 at 9.30.15 am

Example Question #3 : Multiply Or Divide To Solve Word Problems Involving Multiplicative Comparison: Ccss.Math.Content.4.Oa.A.2

It takes Mark  minutes to get dressed in the morning. It takes her older sister, Shelly,  times as long. How long does it take Shelly to get dressed? 

 

Possible Answers:

Correct answer:

Explanation:

The phrase " times as long" tells you that we are going to multiply by 

Let's have  represent how long it takes Shelly to get dressed. 

Think:  minutes  times would be how many minutes? 

Screen shot 2015 10 06 at 10.34.16 am

Example Question #4 : Multiply Or Divide To Solve Word Problems Involving Multiplicative Comparison: Ccss.Math.Content.4.Oa.A.2

It takes Cassie  minutes to get dressed in the morning. It takes her older sister, Linden,  times as long. How long does it take Linden to get dressed? 

 

Possible Answers:

Correct answer:

Explanation:

The phrase " times as long" tells you that we are going to multiply by 

Let's have  represent how long it takes Linden to get dressed. 

Think:  minutes  times would be how many minutes? 

Screen shot 2015 10 06 at 10.44.40 am

Example Question #5 : Multiply Or Divide To Solve Word Problems Involving Multiplicative Comparison: Ccss.Math.Content.4.Oa.A.2

It takes Sam  minutes to get dressed in the morning. It takes her older sister, Kate,  times as long. How long does it take Kate to get dressed? 

 

Possible Answers:

Correct answer:

Explanation:

The phrase " times as long" tells you that we are going to multiply by 

Let's have  represent how long it takes Kate to get dressed. 

Think:  minutes  times would be how many minutes? 

Screen shot 2015 10 06 at 10.49.14 am

Example Question #6 : Multiply Or Divide To Solve Word Problems Involving Multiplicative Comparison: Ccss.Math.Content.4.Oa.A.2

It takes Maggie  minutes to get dressed in the morning. It takes her older sister, Alex,  times as long. How long does it take Alex to get dressed? 

 

Possible Answers:

Correct answer:

Explanation:

The phrase " times as long" tells you that we are going to multiply by 

Let's have  represent how long it takes Alex to get dressed. 

Think:  minutes  times would be how many minutes? 

Screen shot 2015 10 06 at 10.38.56 am

Example Question #1 : Multiply Or Divide To Solve Word Problems Involving Multiplicative Comparison: Ccss.Math.Content.4.Oa.A.2

It takes Tim 5 minutes to get dressed in the morning. It takes his older sister, Lisa, 4 times as long. How long does it take Lisa to get dressed? 

 

Possible Answers:

Correct answer:

Explanation:

The phrase " times as long" tells you that we are going to multiply by 

Let's have  represent how long it takes Lisa to get dressed. 

Think:  minutes  times would be how many minutes? 

Screen shot 2015 10 06 at 9.18.03 am

Example Question #8 : Multiply Or Divide To Solve Word Problems Involving Multiplicative Comparison: Ccss.Math.Content.4.Oa.A.2

It takes Molly  to get dressed in the morning. It takes her older sister, Emily,  times as long. How long does it take Emily to get dressed? 

Possible Answers:

Correct answer:

Explanation:

The phrase " times as long" tells you that we are going to multiply by 

Let's have  represent how long it takes Emily to get dressed. 

Think:  minutes  times would be how many minutes? 

Screen shot 2015 10 06 at 8.59.19 am

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