Pre Algebra Chapter 1

Front 1

What is a digit?

Back 1

A single character in a numbering system.

Front 2

We use the digits 0 1 2 3 4 5 6 7 8 and 9 to write numbers in the

Back 2

Decimal system

Front 3

If we put two or more digits together in a certain order, like 58, we get a

Back 3

Number

Front 4

Single digits like 5 are both

Back 4

Digits and numbers

Front 5

What is a whole number

Back 5

A number with no fractional or decimal part and no negatives

Front 6

Each digit in a whole number represents a _______ _______ that is determined by where it appears in the whole number

Back 6

Place value

Front 7

We use commas to separate each _______ of three digits in a number, starting from the right.

Back 7

Group

Front 8

Groups of three digits in a number are also called

Back 8

Periods

Front 9

Often, the comma is not written in _______ - _______ numbers

Back 9

Four-digit

Front 10

Where do you start when reading or writing numbers

Back 10

At the left

Front 11

Step 1 to writing or saying numbers

Back 11

Say the number in each period (group) followed by the name of the period except for ones.

Front 12

Step 2 in writing or saying numbers

Back 12

Leave off the plural "s" when reading the period.

Front 13

When writing a number from 21 to 99 use a

Back 13

Hyphen

Front 14

We do not use the word _______ when writing or reading numbers

Back 14

And

Front 15

What does it mean to round a number?

Back 15

To find another number close to the original number.

Front 16

Step 1 for rounding numbers

Back 16

Find the place to which we are asked to round. Underline the digit in that place.

Front 17

Step 2 of rounding numbers

Back 17

Look at the digit to the right of the underlined digit. If digit to right is less than 5 leave digit as it is. If more than 5 increase the underlines digit by 1

Front 18

Step 3 of rounding numbers

Back 18

Change all the digits to the right of the underlined digit to zeros.

Front 19

What is a positive number

Back 19

A number greater than 0

Front 20

On a numberline, positive numbers are to the _______ of 0

Back 20

Right

Front 21

What is a negative number

Back 21

A number less than 0

Front 22

What do we do to indicate that a number is negative?

Back 22

Put a "-" sign in front of it

Front 23

On a number line negative numbers are to the _______ of 0

Back 23

Left

Front 24

Is 0 positive or negative

Back 24

Neither

Front 25

Signed numbers

Back 25

What positive, negative numbers and 0 are also called

Front 26

A positive number can be written with a _______ sign it front of it.

Back 26

+

Front 27

If a number has no sign in front of it, it is assumed to be

Back 27

Positive

Front 28

What is an integer

Back 28

Consists of positive and negative counting numbers including 0. They have no fractional or decimal parts.

Front 29

What does this symbol "<" mean?

Back 29

Less than

Front 30

What does the symbol ">" mean?

Back 30

Greater than

Front 31

What is absolute value

Back 31

The distance of a number from 0

Front 32

The absolute value of a number is never

Back 32

Negative

Front 33

The absolute value of a number is denoted by

Back 33

Two vertical bars

Front 34

Two numbers are opposites of each other is they are the

Back 34

Same distance from 0 on a number line but are on opposite sides of 0

Front 35

To find the opposite of a number we write a _______ sign in front of it

Back 35

Negative

Front 36

When we put a negative sign in front of a number we also put the original number in

Back 36

Parentheses

Front 37

The opposite of a negative number is a

Back 37

Positive number