# GED Math : Decimals and Fractions

## Example Questions

### Example Question #61 : Ged Math

Express as a unit rate: $60.75 for 15 gallons of gasoline. Do not use a calculator. Possible Answers:$4.50 per gallon.

$4.35 per gallon$4.15 per gallon

$4.05 per gallon Correct answer:$4.05 per gallon

Explanation:

Divide:

### Example Question #23 : Decimals And Fractions

Evaluate.

Do not use a calculator.

Explanation:

can best be subtracted vertically.

Subtract the integers and the fractions separately:

### Example Question #24 : Decimals And Fractions

Evaluate:

Do not use a calculator.

Explanation:

Add vertically, aligning the decimal points:

### Example Question #25 : Decimals And Fractions

Above is the menu at a coffee shop.

Jimi, Noel, and Mitch each have a coupon that entitles the bearer to either one free butter croissant with the purchase of a large drink or one dollar off the price of a butter croissant with the purchase of a small drink. Each coupon says "limit one".

Jimi purchases one large cafe latte and one butter croissant; Noel purchases one small iced coffee and one butter croissant; Mitch purchases two butter croissants. Order the three from least amount spent to most.

Jimi, Noel, Mitch

Noel, Mitch, Jimi

Noel, Jimi, Mitch

Jimi, Mitch, Noel

Noel, Jimi, Mitch

Explanation:

Jimi purchases a large drink, so he gets his butter croissant free. Therefore, he pays only for the large cafe latte. He spends $3.99. Noel purchases a small drink, so he gets a$1 discount on his butter croissant. He spends $2.49 for the small iced coffee and$1.29 for the butter croissant - a total of .

Mitch does not buy any coffee so he will not use his coupon; he will pay for the two croissants. he will spend .

The three men, in ascending order by amount spent, are Noel, Jimi, and Mitch.

### Example Question #26 : Decimals And Fractions

Without a calculator, raise 0.4 to the third power.

Explanation:

First, multiply without regard to the decimal point:

Since the three factors have a total of three digits to the right of their decimal points, position the decimal point in the result so that three digits are at its right. This makes the result

.

### Example Question #27 : Decimals And Fractions

Above is the menu at a coffee shop. The shop is on a military base and does not charge sales tax.

Zola purchases three butter croissants and three cans of cola. She hands the cashier a $20 bill and gets$10.73 back in change. How much does one can of cola cost?

Explanation:

Zola gets $10.73 in change for a$20 bill, so the price of her food and beverages is

.

She bought three butter croissants, which cost her

.

Subtract this from $9.27 to get the amount she spent on the cola. She bought three cans for$2.40, so each can cost

.

### Example Question #28 : Decimals And Fractions

Of these four numbers, which is the greatest?