Square » square numbers

Find or simplify square , cube and fourth roots of Numbers

admin — Wed, 14 Jul 2010 06:40:23 +0000

Find the square root of 360 or the cube root of 54 or the fourth root of 96.
Susan O. Johnsey www.mathinabox.com

Duration : 0:10:5

[youtube EG8Rcymgauo]

Squaring a 3 digit number with 0 as middle digit swiftly

admin — Fri, 09 Jul 2010 19:30:23 +0000

This video shows a simple and extremely fast method to square 3 digit numbers with 0 as a middle digit. Once this method is understood it should not take more than 3 seconds to square any 3 digit number with 0 as the middle digit.

Duration : 0:4:13

[youtube _YrfIRw2ras]

Simplifying Square Roots – YourTeacher.com – Algebra Help

admin — Mon, 05 Jul 2010 19:22:38 +0000

For a complete lesson on simplifying square roots, go to http://www.yourteacher.com – 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn how to simplify square roots of perfect squares, as well as square roots of numbers that are not perfect squares. The terms radical and radicand are also introduced as vocabulary.

Duration : 0:1:17

[youtube aMO73wbK_iU]

Quickly squaring a 2-digit number

admin — Thu, 01 Jul 2010 14:05:27 +0000

This video will teach you how to quickly square a 2-digit number. With some practice you’ll be able to square any 2-digit number in your head.

Check out http://WildAboutMath.com for more fun Math stuff!

Duration : 0:4:45

[youtube _wjxgz6r-_U]

40 30s 4 15

admin — Sat, 26 Jun 2010 10:20:12 +0000

This is my unusual way of solving the 15 puzzle, including the story that inspired it.

You can learn to do this feat yourself at: http://headinside.blogspot.com/2005/06/40-30s-4-15.html

You can see even more videos of amazing mental feats at the Grey Matters Video Blog at:

http://gmvlog.blogspot.com/

Train and strain your brain to entertain!

Duration : 0:3:37

[youtube c4f5iTpGkOQ]

squaring numbers ending in 5

admin — Mon, 21 Jun 2010 04:44:21 +0000

This stickman video shows how to square numbers ending in 5.

Duration : 0:4:14

[youtube 6gzwjSwGnBY]

squaring numbers ending in 5

admin — Mon, 21 Jun 2010 04:44:21 +0000

This stickman video shows how to square numbers ending in 5.

Duration : 0:4:14

[youtube 6gzwjSwGnBY]

Dividing Square Roots – YourTeacher.com – Math Help

admin — Wed, 16 Jun 2010 22:05:14 +0000

For a complete lesson on dividing square roots, go to http://www.yourteacher.com – 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn to divide square roots by dividing the numbers that are inside the radicals. Students also learn that if there is a square root in the denominator of a fraction, the problem can be simplified by multiplying both the numerator and denominator by the square root that is in the denominator.

Duration : 0:1:37

[youtube UUJWTY3MIy4]

Irrational Square Roots

admin — Sat, 12 Jun 2010 15:46:18 +0000

Learn how irrational numbers were found.

Duration : 0:8:31

[youtube ikwVa7haRh8]

The product of 2 consecutive even numbers is 12 more than the square of the smaller number. Find the numbers?

admin — Wed, 09 Jun 2010 01:21:49 +0000

The product of 2 consecutive even numbers is 12 more than the square of the smaller number. Find the numbers?

Let the first consecutive number be x. It then follows that the second consecutive number must be x + 2.

"The product of 2 consecutive even numbers …."
(product means multiply)

x(x + 2)

"is"

"12 more"

+ 12

"than the square of the smaller number"
x^2

Put it all together, and you get

x(x + 2) = x^2 + 12

Just solve for x.

x^2 + 2x = x^2 = 12

Subtract x^2 both sides, to get

2x = 12
x = 6

That makes the first number x = 6, which means the second number is 8.

The numbers are 6 and 8.