Exploring Rational Number Operations in Precalculus

Mr. Akashi reviews key algebra 2 concepts, focusing on rational numbers, signs, and fractions. The video includes practice problems and solutions, emphasizing the importance of correct sign usage. It concludes with a word problem involving temperature change with altitude.

What topics will be covered in the Algebra 2 review?

• Rational numbers, distributive property, and linear equations

• Quadratic equations, polynomials, and functions

• Statistics, probability, and matrices

• Geometry, trigonometry, and calculus

What is the result of adding two rational numbers with the same sign?

• The sum is always positive

• The sum is zero

• The sum is always negative

• The sum has the same sign as the original numbers

Tags

CCSS.7.NS.A.1C

How do you handle subtraction of rational numbers with the same sign?

• Subtract the numbers and keep the sign

• Change the sign of the second number and add

• Subtract the numbers and change the sign

• Add the numbers and keep the sign

Tags

CCSS.7.NS.A.1C

What is the result of multiplying a negative number by negative one?

• The result is always positive

• The result is the same as the original number

• The result is always negative

• The result is zero

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What happens when you multiply two rational numbers with different signs?

• The product is always positive

• The product is always negative

• The product is the same as the original number

• The product is zero

Tags

CCSS.7.NS.A.2A

How do you multiply fractions?

• Subtract the numerators and denominators

• Divide the numerators and denominators

• Multiply the numerators and denominators

• Add the numerators and denominators

Tags

CCSS.5.NF.B.6

What is the drop, flip, and switch method used for?

• Adding fractions

• Dividing fractions

• Subtracting fractions

• Multiplying fractions

Tags

CCSS.6.NS.A.1

What is the result of dividing two-thirds by one-sixth?

• One-third

• Two

• Four

• One-half

Tags

CCSS.6.NS.A.1

What is the change in temperature for a hot air balloon rising to 8,000 feet using the function t = -5.5 * (a / 1000)?

• -22 degrees Fahrenheit

• -55 degrees Fahrenheit

• -44 degrees Fahrenheit

• -33 degrees Fahrenheit

What should you do if you need to review any part of the video?

• Ignore it

• Skip to the next video

• Rewind and rewrite notes

• Ask a friend

Tags

CCSS.RI.6.7

CCSS.RI.7.7

CCSS.RI.8.7

CCSS.RI.9-10.7

CCSS.RL.7.7