Davis 3Rd Grade Unit 1 Math

Front 1

Compose numbers

Back 1

to combine parts or smaller values to form a number

Front 2

Compare numbers

Back 2

to consider the value of two numbers to determine which number is greater or less or if the numbers are equal in value

Front 3

Counting (natural) numbers

Back 3

the set of positive numbers that begins at one and increases by increments of one each time {1, 2, 3, ..., n}

Front 4

Decompose numbers

Back 4

to break a number into parts or smaller values

Front 5

Digit

Back 5

any numeral from 0 – 9

Front 6

Expanded form

Back 6

the representation of a number as a sum of place values (e.g., 56,789 as 50,000 + 6,000 + 700 + 80 + 9)

Front 7

Expanded notation

Back 7

the representation of a number as a sum of place values where each term is shown as a digit(s) times its place value (e.g., 56,789 as (5 x 10,000) + (6 x 1,000) + (7 x 100) + (8 x 10) + (9 x 1))

Front 8

Numeral

Back 8

a symbol used to name a number

Front 9

Open number line

Back 9

an empty number line where tick marks are added to represent landmarks of numbers, often indicated with arcs above the number line (referred to as jumps) demonstrating approximate proportional distances

Front 10

Order numbers

Back 10

to arrange a set of numbers based on their numerical value

Front 11

Period

Back 11

a three-digit grouping of whole numbers where each grouping is composed of a ones place, a tens place, and a hundreds place, and each grouping is separated by a comma

Front 12

Place value

Back 12

the value of a digit as determined by its location in a number such as ones, tens, hundreds, one thousands, ten thousands, etc.

Front 13

Standard form

Back 13

the representation of a number using digits (e.g., 56,789)

Front 14

Whole numbers

Back 14

the set of counting (natural) numbers and zero {0, 1, 2, 3, ..., n}

Front 15

Word form

Back 15

the representation of a number using written words (e.g., 56,789 as fifty-six thousand, seven hundred eighty-nine)