Math Vocabulary

Front 1

Ordinal Number

Back 1

Numbers used to tell the order of people or objects. (p.4)
Ex.: first, second, third, fourth ...

Front 2

DIGIT

Back 2

The symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 used to write all numbers. (p.6)

Front 3

PLACE VALUE

Back 3

The value given to the place a digit has in a number. (p.6)
Ex.: In 3,567, the place value of the digit 5 is hundreds.

Front 4

Expanded Form

Back 4

A number written as the sum of the values of its digits. (p.6)
Ex.: 2, 367 = 2,000 + 300 + 60 + 7

Front 5

Standard Form

Back 5

A way to write a number showing only its digits. (p.6)
Ex.: 2,367

Front 6

Word Form

Back 6

A number written in words. (p.6)

Ex.: 584 = five hundred eighty-four

Front 7

PERIOD

Back 7

A group of three digits in a nu;mber, separated by a comma. Group from right to left.

Ex.: 65,743

Front 8

COMPARE

Back 8

To decide if one number is greater than or less than another number. (p.18)

Front 9

ORDER

Back 9

To arrange numbers from least to greatest or from greatest to least. (p.22)

Front 10

Even Number

Back 10

A whole number that has 0, 2, 4, 6, or 8in the ones place. (p.24)

Front 11

Odd Number

Back 11

A whole number that has 1, 3, 5, 7, or 9 in the ones place. (p.24)

Front 12

Rounding

Back 12

Replacing a number with a number that tells about how much or how many to the nearest ten, hundred, thousand, and so on. (p.28)

Front 13

Decimal Point

Back 13

A dot used to separate dollars from cents and ones from tenths in a number. (pp. 36, 564)

Front 14

Dollar Sign

Back 14

A symbol used to indicate money. (p.36) $