Number Info for

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Count the number of tens:

0 tens

Add up Ten-Groups

Ten-Groups =

Ten-Groups = 0

Count the number of ones:

1 ones

Add this to the ones for our total:

1 = 0 Hundreds + 0 Tens + 1 ones

1 = 0 + 0 + 1

Show numerical properties of 1

1

Draw this point on a number line:

Word Notation for 1

one

Write the number 1 in expanded notation form:

Decompose 1

Express in powers of 10

Each digit in the whole number represents a power of 10:

Take the whole number portion on the left side of the decimal

Build Expanded Notation with powers of 10

Expanded Notation of 1 = (1 x 10⁰)

Expanded Notation of 1 = (1 x 1)

Prove this is the correct notation:

1 = 1

1 = 1 <---- Correct!

Tally Marks for 1

Make blocks of 5

Tally Marks Definition:

1 tally mark = |

2 tally marks = ||

3 tally marks = |||

4 tally marks = ||||

5 tally marks = | | | |

0 block of 5 and 1 left over

1 = |

Tallies for 1

|

Ordinal for 1

Define an ordinal number

A position in a list

1st

Digit and Reduced Digit Sum for 1

Calculate the digit sum of 1

Calculate the reduced digit sum of 1

Add up 1 digits of 1:

Digit Sum → 1 = 1

Since our digit sum ≤ 9:
we have our reduced digit sum

Digit Sum → 1 = 1

Digit Product for 1:

Calculate the digit product of 1

Digit Product = Value when you multiply
all the digits of a number together.

We multiply the 1 digits of 1 together

Digit product of 1 = 1

Digit product of 1 = 1

Opposite of 1

Opposite of 1 = -(1)

Opposite of = -1

Place Value for 1

Place value describes each digit

Whole Number Position 1: 1

1 is our ones digit

This means we have 1 sets of ones

1 is our ones digit

Natural Logarithm of 1

When e^y = x and e = 2.718281828459
We have Ln(x) = log_e(x) = y

Evaluate x = 1

Ln(1) = log_e(1) = 0

Is 1 divisible by:

2,3,4,5,6,7,8,9,10,11

Divisibililty Check for 2

Last digit ends in 0,2,4,6,8

The last digit of 1 is 1

Since 1 is not equal to 0,2,4,6,8:
then 1 is not divisible by 2

Divisibililty Check for 3

Sum of the digits is divisible by 3

The sum of the digits for 1 is 1 = 1

Since 1 is not divisible by 3:
Then 1 is not divisible by 3

Divisibililty Check for 4

Take the last two digits
Are they divisible by 4?

The last digit of 1 is 1

Since 1 is not divisible by 4:
Then 1 is not divisible by 4

Divisibililty Check for 5

Number ends with a 0 or 5

The last digit of 1 is 1

Since 1 is not equal to 0 or 5:
Then 1 is not divisible by 5

Divisibililty Check for 6

Divisible by both 2 and 3

Since 1 is not divisible by 2 and 3:
Then 1 is not divisible by 6

Divisibililty Check for 7

Multiply each respective digit by 1,3,2,6,4,5
Work backwards
Repeat as necessary

1(1) = 2

Since 2 is not divisible by 7:
Then 1 is not divisible by 7

Divisibililty Check for 8

Take the last three digits
Are they divisible by 8

The last digit of 1 is 1

Since 1 is not divisible by 8:
Then 1 is not divisible by 8

Divisibililty Check for 9

Sum of digits divisible by 9

The sum of the digits for 1 is 1 = 1

Since 1 is not divisible by 9:
Then 1 is not divisible by 9

Divisibililty Check for 10

Ends with a 0

The last digit of 1 is 1

Since 1 is not equal to 0:
Then 1 is not divisible by 10

Divisibililty Check for 11

Σ odd digits - Σ even digits = 0
or 1 is a multiple of 11

Sum the odd digits:

1

1

Odd Sum = 1

Sum the even digits:

1

Even Sum = 0

Take the difference:

Δ = Odd Sum - Even Sum

Δ = 1 - 0

Δ = 1

Divisibility Check:

Because Δ / 11 = 0.090909090909091:
Then 1 is NOT divisible by 11

Final Answer

Tags:

• integer
• number
• property
• tally