Dyscalculia‎ > ‎


There are 10 basic digits that are used to make up numbers:

0    1    2    3    4     5    6    7    8    9

Ten fingers, called digits, and ten numerals, called digits, 0,1,2,3,4,5,6,7,8,9.

Fingers are also called "digits" and there are also 10 of them, 
      and we use them to count.

      The tenth finger is called "ten" or 10, which is comprised of two digits, a 1 and a 0.

                                                             The 10 digits are also known as NUMERALS

                                                            The Romans had a different system of numbers, called Roman Numerals:
roman numerals
We use a Base Ten System to encode (write) and decode (read) numbers. 
Where the digits are placed, determines the meaning or value.

     The position of letters changes a word: 

The position of digits changes the meaning of a number:

           01                               10 

one candle     
ten candles

Like only one car fits in a parking space, only one digit can fit in a number parking place. 

Place Value Parking Lot 10

When you face a number or you look at a number, 
think that your head is the decimal point. 

The decimal point separates whole numbers from parts or pieces or fractions of whole numbers.

Your head is your decimal point. Your head separates the whole numbers on the left side from the parts or pieces or fractions on the right side. Numbers get larger as they take up more places to the left of the decimal point. Numbers values get smaller on the right of the decimal point.

Our place value system increases by trading up to the left of the decimal point and trading down to the right of the decimal point in sets of 10. 

So moving <---- LEFT starting at the decimal point, you count 10 ones, then trade them in for 1 ten,
 then count 10 tens and trade them in for 1 hundred. 
Then count 10 hundred and trade them in for 1 thousand,
then count 10 thousand and trade them in for 1 ten-thousand...keep this pattern like in the picture below.

Place Value from one to Quadrillion

Print out the bills in the image above using this TEACHING MONEY PDF file. Then practice trading up. 

Review these large numbers in the news and use your bills to demonstrate the amounts!

Russian Asteroid Crater Has Over $1 Quadrillion of Diamonds   Watch Video

NASA brings forward a mission to explore $10,000 quadrillion metal asteroid   Watch Video

How much is all that money? Look at these illustrations!  More illustrations

Direction and Time - Around the World and Around the Clock

Compass Bearings

Magnetism: National Geographic documentary --- Understanding Magnetism

Earth's Magnetic Field --- ready for a magnetic pole shift NOVA Documentary (Magnetic Storm

Magnetism YouTube Channel

Compass Clock

Compass Watch Silver

Subpages (1): Words