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  •  » Can Someone Please Tell me a Good Way to Remember Square Route? =-S

#1 2005-08-07 19:25:19

dollysaunder
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Can Someone Please Tell me a Good Way to Remember Square Route? =-S

Sophie wrote:

Help me please! i really need help! I alwats forget what square route is! and next year i'm going into Year 7 so i think that I really should know! please help me with a good strategy! If you don't have a strategy please tell me what it is! i just got retold last week! i have a horrible memory sometimes! hmm

#2 2005-08-07 20:55:15

MathsIsFun
Administrator

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Re: Can Someone Please Tell me a Good Way to Remember Square Route? =-S

Are YOU asking, dollysaunder?

Anyway, square root is just the opposite of square.

To square a number is to multiply it by itself. The square of 5 is 5x5=25, so the square root of 25 is 5.

5   Squared ==>       25
5  <== Square Root   25

So, for example: what is the square root of 36 ???

*thinks* 6 x 6 = 36. (6 squared is 36)

Answer: the square root of 36 is 6

And if that fails then think of a square:

RRRR
RRRR
RRRR
RRRR

That square has 16 Rs in it, and it is 4 Rs wide by 4 Rs high.

So, 4 squared is 16.
And the square root of 16 is 4.

What is the square root of 81 ???


"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

#3 2005-08-08 15:13:57

wcy
Full Member

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Re: Can Someone Please Tell me a Good Way to Remember Square Route? =-S

here are some tips to remember square root of large numbers..

you can break up the square root into two or more parts, eg

√36=√4 x √9 =2x3=6
that way, you need to remember less values
but this can only work for some numbers

#4 2005-08-08 15:32:08

ganesh
Moderator

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Re: Can Someone Please Tell me a Good Way to Remember Square Route? =-S

Here are the squares and square roots of all squares up to 31.
1 = 1
2 = 4
3 = 9
4 = 16
5 = 25
6 = 36
7 = 49
8 = 64
9 = 81
10 = 100
11 = 121
12 = 144
13 = 169
14 = 256
15 = 225
16 = 256
17 = 289
18 = 324
19 = 361
20 = 400
21 = 441
22 = 484
23 = 529
24 = 576
25 = 625
26 = 676
27 = 729
28 = 784
29 = 841
30 = 900
31 = 961

Remember,
(1) The last digit of a perfect square is always 0, 1, 5, or 6.
(2) Finding square roots is easier by prime factorisation.
eg. 784 = 2 x 2 x 2 x 7 x 7 x 7
Therefore, the square root of 784 is 2 x 2 x 7, i.e. 28


Character is who you are when no one is looking.

#5 2005-08-30 02:01:06

John E. Franklin
Guest

Re: Can Someone Please Tell me a Good Way to Remember Square Route? =-S

To help jog your memory, visualize a tree with roots under the ground.

The roots are below the tree, so remember that the answer to a square root problem is usually smaller (roots below).

The square root of any number above one is going to be smaller than what you started with.

However, if you become a math wiz someday, you will learn that the square root of numbers between zero and one become bigger!

Good Luck!

#6 2005-09-23 04:54:34

aliya whyte
Guest

Re: Can Someone Please Tell me a Good Way to Remember Square Route? =-S

dollysaunder wrote:

Sophie wrote:

Help me please! i really need help! I alwats forget what square route is! and next year i'm going into Year11so i think that I really should know! please help me with a good strategy! If you don't have a strategy please tell me what it is! i just got retold last week! i have a horrible memory sometimes! hmm

sadsad sadsadsad i neeed help with double digit and all the rest digit number. love aliya.
sad

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