HSPT Math : Arithmetic

Study concepts, example questions & explanations for HSPT Math

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Example Questions

Example Question #301 : Arithmetic

Solve:

\(\displaystyle \frac{2}{5}\times \frac{3}4=\)

Possible Answers:

\(\displaystyle \frac{3}{10}\)

\(\displaystyle \frac{5}{9}\)

\(\displaystyle \frac{8}{15}\)

\(\displaystyle \frac{6}{5}\)

Correct answer:

\(\displaystyle \frac{3}{10}\)

Explanation:

\(\displaystyle \frac{2}{5}\times \frac{3}{4}=\frac{2\times3}{5\times4}=\frac{6}{20}=\frac{3}{10}\)

Example Question #302 : Arithmetic

Multiply the fractions:

\(\displaystyle \frac{2}{4}*\frac{5}{7}=\)

Possible Answers:

\(\displaystyle 10\)

\(\displaystyle 28\)

\(\displaystyle \frac{1}{4}\)

\(\displaystyle \frac{5}{14}\)

\(\displaystyle \frac{1}{5}\)

Correct answer:

\(\displaystyle \frac{5}{14}\)

Explanation:

To multiply fractions, multiply both numerators on top and both denominators on the bottom.

\(\displaystyle \frac{2}{4}*\frac{5}{7}=\frac{2*5}{4*7}=\frac{10}{28}\)

Then, reduce to simplest form by removing any common factors:

\(\displaystyle \frac{10}{28}=\frac{10\div2}{28\div2}=\frac{5}{14}\)

Answer: \(\displaystyle \frac{5}{14}\)

Example Question #303 : Arithmetic

Solve:

\(\displaystyle \small \frac{3}{10}\times \frac{16}{15}=\)

Possible Answers:

\(\displaystyle \small \frac{19}{25}\)

\(\displaystyle \small \small \frac{9}{32}\)

\(\displaystyle \small \frac{41}{30}\)

\(\displaystyle \small \frac{8}{25}\)

\(\displaystyle \frac{19}{150}\)

Correct answer:

\(\displaystyle \small \frac{8}{25}\)

Explanation:

\(\displaystyle \small \frac{3}{10}\times \frac{16}{15}=\frac{48}{150}=\frac{8}{25}\)

Example Question #304 : Arithmetic

Solve for y:

\(\displaystyle \frac{3}{2y}=\frac{6}{x}\)

Possible Answers:

\(\displaystyle \frac{x}{4}\)

\(\displaystyle 4\)

\(\displaystyle \frac{1}{2}\)

\(\displaystyle \frac{x}{3}\)

Correct answer:

\(\displaystyle \frac{x}{4}\)

Explanation:

In order to solve for y, cross multiplication must be used. Appyling cross multiplication, we get:

\(\displaystyle \frac{3}{2y}=\frac{6}{x}\)

\(\displaystyle 12y=3x\)

Next, we divide each side by 12. 

This results in \(\displaystyle y=\frac{x}{4}\) 

Example Question #305 : Arithmetic

On Monday, Marsha saw a sweater that she wanted to buy. It was 15 dollars. She went back the next day and saw that it was only 10 dollars. Which of the following is a sale that the store could have been running, explaining the reduced price on the sweater?

Possible Answers:

\(\displaystyle 50\) percent off

\(\displaystyle \frac{2}{5}\) off

\(\displaystyle 30\) percent off

\(\displaystyle \frac{1}{3}\) off

Correct answer:

\(\displaystyle \frac{1}{3}\) off

Explanation:

Given that the sweater's price was reduced by 5 dollars, this is a one third reduction because one third of 15 dollars is 5 dollars. 15 dollars minus 5 dollars is equal to 10 dollars.

Thus, the correct answer is:

 \(\displaystyle \frac{1}{3}\) off

Example Question #1401 : Isee Middle Level (Grades 7 8) Mathematics Achievement

\(\displaystyle \frac{4^{^{2}}+\left ( 12-4 \right )}{2}\)

Possible Answers:

\(\displaystyle 12\)

\(\displaystyle 36\)

\(\displaystyle 16\)

\(\displaystyle 8\)

\(\displaystyle 0\)

Correct answer:

\(\displaystyle 12\)

Explanation:

In order to solve:

First, solve the exponent equation within the numerator portion of the fraction:

\(\displaystyle \small \small \frac{4^{2} + \left ( 12-4 \right )}{2}=\)

Then, solve the equation within the parentheses:

\(\displaystyle \small \small \frac{16+8}{2}=\)

Then, solve the entire equation in the numerator portion and divide the numerator by the denominator.

\(\displaystyle \small \small \frac{24}{2}=12\)

Answer: 12

Example Question #511 : Numbers And Operations

\(\displaystyle \small 2 \frac{1}{5} \div 1 \frac{2}{4}=\)

 

Possible Answers:

\(\displaystyle \small 3 \frac{3}{10}\)

\(\displaystyle \small 2 \frac{1}{10}\)

\(\displaystyle \small 4\)

\(\displaystyle \small 1 \frac{7}{15}\)

Correct answer:

\(\displaystyle \small 1 \frac{7}{15}\)

Explanation:

To solve:

First, turn the mixed fractions into improper fractions.

\(\displaystyle \small \small \small \frac{11}{5}\div \frac{6}{4}=\)

Then, change the operation to multiplication and flip the second fraction. Solve accordingly and simplify the answer if possible.

\(\displaystyle \small \small \frac{11}{5}\cdot \frac{4}{6}=\)

The answer is \(\displaystyle \small 1\frac{7}{15}\).

 

Example Question #511 : Numbers And Operations

What is \(\displaystyle \frac{3}{5}\) divided by \(\displaystyle \frac{3}{25}\)?

Possible Answers:

\(\displaystyle 5\)

\(\displaystyle \frac{3}{5}\)

\(\displaystyle \frac{1}{5}\)

\(\displaystyle 3\)

\(\displaystyle 15\)

Correct answer:

\(\displaystyle 5\)

Explanation:

\(\displaystyle \frac{3}{5}\div\frac{3}{25}=\frac{3}{5}\cdo*\frac{25}{3}=5\)

Example Question #1 : How To Divide Fractions

Evaluate:

 \(\displaystyle \frac{\frac{2}{7}}{\frac{9}{14}}\)

Possible Answers:

\(\displaystyle \frac{4}{9}\)

\(\displaystyle \frac{49}{9}\)

\(\displaystyle \frac{9}{4}\)

\(\displaystyle \frac{13}{14}\)

\(\displaystyle \frac{9}{4 9}\)

Correct answer:

\(\displaystyle \frac{4}{9}\)

Explanation:

Rewrite this horizontally as a division expression, rewrite as a product, cross-cancel, and multply across:

\(\displaystyle \frac{\frac{2}{7}}{\frac{9}{14}}\)  \(\displaystyle = \frac{2}{7} \div \frac{9}{14} = \frac{2}{7} \cdot \frac{14}{9} = \frac{2}{1} \cdot \frac{2}{9} = \frac{2\cdot 2}{1\cdot 9} =\frac{4}{9}\)

Example Question #306 : Arithmetic

\(\displaystyle \frac{2}{5}\div 2\frac{3}{5}=\)

Possible Answers:

\(\displaystyle \frac{2}{13}\)

\(\displaystyle \frac{13}{2}\)

\(\displaystyle 1\frac{1}{25}\)

\(\displaystyle 2\frac{6}{25}\)

Correct answer:

\(\displaystyle \frac{2}{13}\)

Explanation:

First, convert each fraction into an improper fraction

\(\displaystyle \frac{2}{5}\div 2\frac{3}{5}=\frac{2}{5}\div \frac{13}{5}=\)

Then, change the operation to mulitplication and flip the second fraction:

\(\displaystyle \frac{2}{5}*\frac{5}{13}=\)

Reduce and solve accordingly:

Answer: \(\displaystyle \frac{2}{13}\)

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