7th Grade Math TCAP Review 2024

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together. It is expressed as a quantity of one unit. For example, if a farmer uses 3/4 of a bag of seed for 1/2 of his field, the unit rate is calculated to find out how many bags are needed for the entire field.

Front

How do you calculate a percentage tip?

Back

To calculate a percentage tip, multiply the total bill by the percentage (in decimal form). For example, for a $17.50 bill with a 20% tip, you calculate: $17.50 x 0.20 = $3.50.

Front

What is a biased sample?

Back

A biased sample is a sample that does not accurately represent the population from which it is drawn. For example, asking only students in one class about their favorite soda flavor may not reflect the preferences of all students.

Front

How do you calculate temperature changes?

Back

To calculate temperature changes, add or subtract the change in temperature from the initial temperature. For example, if the temperature is -10ºF and it rises by 15º, the new temperature is -10 + 15 = 5ºF. If it then drops by 25º, the new temperature is 5 - 25 = -20ºF.

Front

What is the result of -24 divided by 4?

Back

-24 divided by 4 equals -6.

Front

What is the formula for finding the unit rate?

Back

The formula for finding the unit rate is: Unit Rate = Total Quantity / Number of Units. For example, if 3/4 of a bag covers 1/2 of a field, the unit rate is (3/4) / (1/2) = 1 1/2 bags per field.

Front

What does it mean to tip 20%?

Back

Tipping 20% means giving a gratuity that is 20% of the total bill amount. It is a common practice in restaurants to show appreciation for good service.

Front

What is the difference between biased and random sampling?

Back

Biased sampling involves selecting a sample that does not represent the population, while random sampling involves selecting individuals from the population in such a way that every individual has an equal chance of being chosen.

Front

How do you convert a fraction to a decimal?

Back

To convert a fraction to a decimal, divide the numerator by the denominator. For example, 1/2 = 1 ÷ 2 = 0.5.

Front

What is the significance of negative numbers in temperature?

Back

Negative numbers in temperature indicate temperatures below zero degrees, which is the freezing point of water. For example, -10ºF means ten degrees below freezing.