8th Grade Math Test Review Challenge

This video tutorial prepares students for the 8th grade math exam by covering key concepts such as order of operations, square roots, exponents, percentages, and scientific notation. The instructor emphasizes understanding the concepts behind the calculations, whether or not a calculator is used. Through a series of problems, students learn to apply mathematical principles to solve equations, identify rational and irrational numbers, and work with scientific notation. The tutorial concludes with a final problem-solving exercise, reinforcing the skills and knowledge gained throughout the lesson.

What is the primary purpose of understanding the concepts behind mathematical operations?

• To use calculators more effectively

• To prepare for standardized tests

• To improve problem-solving skills

• To memorize formulas

In the order of operations, which operation should be performed first?

• Parentheses

• Multiplication

• Exponents

• Addition

What is the result of the expression 2 * (4 + 6)^2?

• 20

• 64

• 100

• 200

How do you calculate the value of an expression with both cubes and squares?

• Add squares and cubes

• Calculate cubes before squares

• Subtract squares from cubes

• Calculate squares before cubes

What formula is used to calculate the percent decrease?

• (Old amount / New amount) * 100

• (Old amount - New amount) / New amount * 100

• (New amount - Old amount) / Old amount * 100

• (New amount / Old amount) * 100

What is the percent decrease if the sodium content is reduced from 500mg to 410mg?

• 20%

• 18%

• 22%

• 15%

Which number is considered an irrational number?

• -32

• 7.388

• √13

• -√25

What is the value of 1.1 * 10^0?

• 1.1

• 11

• 0.11

• 0

Which pair of numbers are both between 8 and 9?

• √64 and √81

• √65 and √72

• √60 and √69

• √50 and √64

What is the value of 8/9 * (3/2)^3?

• 6

• 3

• 4

• 9