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GED Math : Multiplication

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Example Questions

Example Question #41 : Multiplication

Multiply the following numbers: $78\times 52$

Possible Answers:

4056

4146

3956

$\textup{The answer is not given.}$

3946

Correct answer:

4056

Explanation:

Multiply the first digit of 78 with the first digit of 52.

$78\times 2 = 156$

Multiply the first digit of 78 with the second digit of 52.

$78\times 5 = 390$

Add a zero to the end of this number and add it with the first number.

3900+156 = 4056

The answer is: 4056

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Example Question #42 : Multiplication

A sweater that normally costs $\$150$ goes on sale at $15\%$ off for a week. After the first week, the sweater is discounted a further $20\%$ and is sold. How much did the sweater sell for?

Possible Answers:

$\$102$

$\$97.50$

$\$82.50$

$\$120$

Correct answer:

$\$102$

Explanation:

Start by finding the first sale price of the sweater. Since it was $15\%$ off, we can write the following equation to find the first sale price.

$\text{First Sale Price}=150-150(0.15)=127.50$

Now, since the sweater did not sell at this first sale price, another $20\%$ was taken off the price. We can then write the following equation to find the second sale price.

$\text{Second Sale Price}=127.50-127.50(0.2)=102$

Thus, the sweater sold for $\$102$ .

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Example Question #43 : Multiplication

What is the value of 4x^3+6y^2 when x=4 and y=-8 ?

Possible Answers:

576

640

768

704

Correct answer:

640

Explanation:

Plug in the given values for the and .

4x^3+6y^2=4(4)^3+6(-8)^2

Now, follow the order of operations.

Simplify the exponents first.

4(4)^3+6(-8)^2=4(64)+6(64)

Then simplify the multiplication, then add.

4(64)+6(64)=256+384=640

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Example Question #91 : Basic Operations

Solve for $\small z$ : $\small \frac{z}{6}=y-3x$

Possible Answers:

$\small z=y-\frac{1}{2}x$

$\small z=6y+18x$

$\small z=\frac{3y-x}{6}$

$\small z=18y-6x$

$\small z=6y-18x$

Correct answer:

$\small z=6y-18x$

Explanation:

In order to solve for $\small z$ , we need to move all of the variables over to one side.

We can see that our $\small z$ is being divided by $\small 6$ , so in order to move that $\small 6$ we'll need to multiply it on the other side.

$\small \frac{z}{6}=y-3x$

$\small z=(y-3x)6$

$\small z=6y-18x$

Since none of our variables are the same, we cannot proceed any further in this equation.

Our answer is $\small z=6y-18x$

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Example Question #101 : Basic Operations

Solve for : $\small \frac{s}{p}=t$

Possible Answers:

$\small s=\frac{t}{p}$

$\small s=t-p$

$\small s=\frac{p}{t}$

$\small s=tp$

$\small s=t+p$

Correct answer:

$\small s=tp$

Explanation:

In order to solve for $\small s$ , we'll need to get all the other variables to one side so. Right now $\small s$ is being divided by $\small p$ , so we need to multiply the $\small p$ to the other side in order to move it.

$\small \frac{s}{p}=t$

$\small s=(t)p$

$\small s=tp$

Since all the variables are different we can't do anything else to simplify the equation.

Our answer is $\small s=tp$

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Example Question #102 : Basic Operations

Solve for $\small m$ : $\small \frac{m-x}{y}=t+z$

Possible Answers:

$\small m=ty-zy+xy$

$\small m=ty+zy-x$

$\small \small m=ty-zy-xy$

$\small m=ty+zy+xy$

$\small m=ty+zy+x$

Correct answer:

$\small m=ty+zy+x$

Explanation:

In order to solve for $\small m$ , we need to make sure that all our other variables are on the other side of the equation.

At the moment $\small m$ is being surrounded by $\small x$ and $\small y$ so we need to move these variables to the other side of the equation.

Let's begin by multiplying $\small y$ on the other side.

$\small \frac{m-x}{y}=t+z$

$\small m-x=(t+z)y$

$\small m-x=ty+zy$

We still have $\small -x$ near $\small m$ , so we'll need to add $\small x$ to the other side in order to get $\small m$ alone.

$\small m-x=ty+zy$

$\small m=ty+zy+x$

Since there are no numbers and none of the variables are the same we can't do anything else to this equation.

Our answer is $\small m=ty+zy+x$

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Example Question #44 : Multiplication

Solve this equation: 4*2

Possible Answers:

Correct answer:

Explanation:

Multiplication is a lot like adding, just with multiples of the same number.

We can solve this two ways, so we will do it both. Let's start with first.

So we can see that is being multiplied by . This is the same as saying we are adding two 's.

4+4=8

Now let's go with . We can see that is being multiplied by , which is the same as saying we are adding four 's.

2+2+2+2=8

Either way you pick, both routes give us the answer .

Our answer is .

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GED Math : Multiplication

Study concepts, example questions & explanations for GED Math

All GED Math Resources

Example Questions

Example Question #41 : Multiplication

Example Question #42 : Multiplication

Example Question #43 : Multiplication

Example Question #91 : Basic Operations

Example Question #101 : Basic Operations

Example Question #102 : Basic Operations

Example Question #44 : Multiplication

All GED Math Resources

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