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Dave's Math K-12
เข้าร่วมเมื่อ 14 เม.ย. 2015
Dave'sMath K-12: Short math videos
Solving Quadratic Equations by Factoring K-12
Solving Quadratic Equations by Factoring K-12
มุมมอง: 132
วีดีโอ
Double angle formula, 1 ex. cos2theta=cos^2theta-sin^2theta
มุมมอง 6757 ปีที่แล้ว
Trigonometry: One example using a Double Angle Formula for Integrated 3. Cos2theta=cos^2theta-sin^2theta
Prime Factorization: factor trees and ladder method
มุมมอง 52K7 ปีที่แล้ว
Prime numbers and composite numbers. How to factor numbers using the factor tree and ladder method.
How to convert non-repeating decimals to fractions--and back.
มุมมอง 2.2K8 ปีที่แล้ว
How to convert non-repeating decimals to fractions and back.
PEMDAS/Order of operation-How to use it.
มุมมอง 868 ปีที่แล้ว
PEMDAS: How to use it and a few examples.
Dividing By Zero is "Undefined"
มุมมอง 2628 ปีที่แล้ว
Dividing a number by zero is always: "undefined." : and zero divided by zero (0/0) is considered: "indeterminate."
The Real Number System
มุมมอง 2528 ปีที่แล้ว
Real numbers include: Natural numbers, Whole numbers, Integers, Rational numbers, and Irrational numbers.
Simplifying Radical Expressions/Algebra 1/Common Core
มุมมอง 1.4K9 ปีที่แล้ว
Simplifying perfect square radicals and non-perfect square radicals. Plot radicals on a number line. Radicals are just numbers that can be plotted on a number line!
Thank you so much, Dave.
This video helped a lot
Your voice was too low
this video was very helpful ty ✨ i have tomorrow a test (final)
Good Luck! I hope you do well!
Thank you so much I really needed to now this for a test
This really helps me in my study!
Great!
Thanks a lot , it was easy to understand, THANK YOU.
thank you too!
full HD 4K
Super!
Tysm I got a 94% on my test
Great! Keep it up.
Thank you so much! I didn’t understand the notes but this explained perfectly!
Glad I could help!
It’s funny how you teach better than my teacher 👍
Thank you so much I got perfect on my test 😊
I'm glad I could help!
Fuck the factor tree
Thanks Dave you have a new follower
You're welcome!Thank you
thank you!
This video was very helpful and easy to understand. Thank you!
And thank you for watching!
Thank you because ihave exam tomorrow so ican review it
Perfect!
this helped bc I wasn’t paying attention in math 😂😂✌️
Smae
Same
I'm glad you liked it. Math is fun!
nice video
Thank you for watching!
Nice video
Thank you for watching!
It help me too much
Glad I could help!
This helped my last minute studying
Glad it helped!
Dave'sMath K-12 thanks so much again
Dave'sMath K-12 I would have gotten a very low grade but this helped
Hello, fellow procrastinator.
Glad I could help!
My Favorite is: 2:15
Thank you!
Great!
really its a very good lesson scientific notation thank you very much*😊
Thank you!
0.3333... is NOT irrational!
Where can I get the answers of homework question
Hi! There is a free online Algebra calculator(Mathway) that you can Google to check your answers. Also, you might want to buy a nice calculator like the Texas Instruments 84 (TI-84). It does so,so much! Good-luck!
udaya poudel picture math
At 3:48, I didn't know which 2 numbers made 91, can you tell me how i can find out?
Hello, great question! I have prime numbers to 100 posted near my computer. First, I quickly checked prime numbers to make sure that 91 wasn't prime. Then I took a guess at a few numbers in my head-- then came up with the right answer: 7x13=91. Good luck!
Ohh, thank you!!!
Dave,What If I had 3 as my prime number and on the other side I had 125 and I know for a fact 125 is not a prime number because you can do 5x5x5 and the only way you can get 3 is by doing 1.5 x 2 and I may reply late because i will be doing my cats test, thank you
Hmmm..depends on the composite number you start out with to find prime factors. Try thinking of multiplying all your prime numbers to get to the composite number. Prime numbers for 125 are 5x5x5 or if you have 3x5x5x5 then your beginning composite number is 375.
Oh okay, Thanks I subscribed and liked your video!
Thank you so much sir you really helped me
You're welcome! Glad I could help you.
very nice
Thank you!
good video. For the ladder, how do you know which numbers to plug in on the side though? like what if two numbers go into a digit then which do you choose?
Hello, start with the lowest prime number that will divide evenly into your composite number: 2, 3, 5, 7 etc. --I meant to say that in the video--..."start with the lowest prime number."
Bad
Tysm! I aced my test ((:
Congratulations!
9! I'm the ninth subscriber ;)
this helped a lot, thanks