Math Concepts and Problem Solving

This video is part two of the Mathfolio series for 7th grade, focusing on various math topics. It covers calculating mean averages with negative numbers, solving inequalities, understanding percent increases, and converting percentages to fractions. The video also explains the concept of a fair die, solving word problems involving spending money, and estimating sales tax. Each section provides detailed explanations and examples to help students understand and apply these mathematical concepts.

What is the primary purpose of the Mathfolio series for 7th-grade students?

• To provide test prep review and summer school material.

• To teach history and geography.

• To introduce advanced calculus concepts.

• To focus on physical education.

How do you calculate the mean average low temperature when given negative numbers?

• Ignore the negative signs and add the numbers.

• Subtract the smallest number from the largest.

• Multiply the numbers and divide by two.

• Add the numbers and divide by the total count.

Which of the following products is greater than or equal to zero?

• -3 + 5

• 5 * -3

• -4 * -3

• -5 * 0

What is the percent increase if the price of milk rises from $3.29 to $3.99?

• 5%

• 21%

• 10%

• 15%

How do you find the mean average of numbers on a number line?

• Add all numbers and divide by the number of values.

• Add the first and last numbers only.

• Multiply all numbers together.

• Subtract the smallest number from the largest.

What defines a fair die in probability?

• All sides are equally likely to appear.

• One side is heavier than the others.

• It has more than six sides.

• It is used in casinos.

If Jose spent $79.50 on a jacket and $37.50 on a ticket, how much did he spend in total?

• $115.00

• $120.00

• $116.00

• $117.00

How many cups of punch are needed for one person if 6.5 cups serve 10 people?

• 0.75 cups

• 0.55 cups

• 0.85 cups

• 0.65 cups

Convert 3.4% to a fraction.

• 1/50

• 17/500

• 34/1000

• 3/100

What is an equivalent ratio to 3:4?

• 6:8

• 7:9

• 2:3

• 5:6