Name: When to cross multiply and when not to cross multiply
Uploaded: 2023-12-26T21:47:19.296Z
Duration: 1 min 8 s
Description: Here is a really quick video telling you on when to cross multiply and when not to cross multiply.

Here is a really quick video telling you on when to cross multiply and when not to cross multiply. 

Math

Hi Everyone! I have been an educator for over 15 years, teaching in the US, Asia, and the Middle East. I have a BA in Secondary Education and an MBA. I have taught everything from Math (up through HS Geometry and Algebra) to History (US, World, Asian, European), English (TEFL certified, 5 years teaching English as a second Language), and even Science (making stuff fizz and pop is fun!). I've also learned a number of things through my travels; cultural adaptation, working through communication barriers, travel organizing, living overseas, chess, how to work with people from multiple countries and cultures! There is so much I want to share! I am truly excited to teach and learn with you.

When to cross multiply and when not to cross multiply

2bf2255c-05e8:37755;isclassifiedstrendingsuggestionsenableddt:42136;316f64c0-2415:46048;b2454379-d6cf:44572;335d7519-3303:46159;6d3f11ff-ee6c:47314;9979286f-d859:47315;ei83g319:53872;47h3f766:58362;fg008402:58376;i6jj6667:86739;istutorredesignv2_1:73124;a5gbd220:61179;blogpwt:71359;5db3b892:67466;2a2j8400:70238;b534g232:70741;j91hb444:69773;18h21436:69961;85h98405:81245;0eie7335:76839;cia78296:75037;9b4gd804:78753;deisn977:110326;1d789912:110325;slcardst:87990;searchranking_newpqs:91321;b1ff5649:88417;d9c7i206:87231;ajgj0920:88926;a1d06430:92612;15gbg809:92228;3cf2h499:95552;90ahj157:94513;2a718373:100011;gg41j822:94817;3i5dg498:97157;05c5i927:97770;241d3193:100431;9ab7j510:99496;a0ge6769:101092;bfb37872:105751;7f8gg909:114000;eh7a9388:114646;

American Government

Chess

Elementary

Middle School

High School

College

Intensive Math March Madness 2018

I am a certified teacher in the state of Florida in a number of subjects: 
Math 5-9
Social Studies - History - Govt. - 5-12
Business 9-12

Teacher Certification

Bachelor of Arts - Secondary Education w/ a concentration in Social Studies

Masters of Business Administration

Taught students in multiple concepts from grades KG through 8. Helped students not only learn, but retain all the information they needed, always making sure my students left my room with a smile.

Math Teacher

Developed and implemented lessons for students studying English and History while leading an international team of educators in multiple subject in an international school in Kuwait.

Grade 5 Leader

Lived and worked in Asia as an English instructor for three years. Helped and mentored new teachers coming in to a different country and culture. Fostered and increased student enrolment in every school I worked in. Participated in local television ads to foster student enrollment.

English Teacher

Created and taught multiple US History and AP US History classes in both the county's alternative high school as well as regular classes. Successfully transitioned students from the alternative high school back to regular classes at their home schools.

History Teacher

Worked with a number of students, both in person and online, to help them increase their understanding and knowledge of the subject they contacted me to help them with.

Tutor

Spanish

English

Korean

Teacher with 15 years of experience teaching students both domestically and internationally. Are you confused about certain mathematical concepts and need someone to explain it to you in a way you can actually understand? Utilizing my vast knowledge and experience in teaching people from ages 5 to 50 (not exaggerating!), I know I can come up with an entertaining and thought provoking lesson that will give you all the information you need and leave you with a sense of accomplishment. That's not to mention the smiles I am sure we will share. So let the learning begin! Huzzah! 

Derek is a really good instructor. He is very knowledgeable and he knows how to make learning fun. 10/10 I would recommend Derek to anyone who is interested in learning how to play chess. Regardless of age or skill level Derek is the one to learn from.

Here is a quick video showing you how to accurately multiply and divide radical expressions. 

Radical Expressions - Multiplying / Dividing

Short video on how to divide polynomials accurately using the synthetic division method. 

Dividing Polynomials - Synthetic Division 

Here is a short video showing you how to divide polynomials using long division. 

Dividing Polynomials - Long Division 

Short, quick and easy video showing how to multiply fractions. 

Multiplying fractions

Short and simple video showing you how to divide by fractions. 

Dividing Fractions

Quick video showing you how to accurately divide with decimals. 

Dividing Decimals

Short video showing you how to multiply decimals accurately. 

Multiplying Decimals

A quick video showing you how to add and subtract decimals accurately. 

Adding and Subtracting Decimals

Here is a short step by step video on how to turn simple fractions into decimals. 

How to turn fractions into decimals

A quick introduction on what fractions are. 

Intro to Fractions

Here is a quick video on how you can change mixed numbers into improper fractions quickly. 

Derek M.

When to cross multiply and when not to cross multiply

Derek's Math videos