# Math Expressions Vocabulary

The following represents some of the vocabulary that we will be using during math this year:

add : combine partners to find the total

arrangement: A way to display objects to represent numbers.  A number can be arranged in different ways and look different, but it is still a number.

attribute: A characteristic or feature of an object or person.

Break- Apart Stick: A simple stick (such as a coffee stirrer) children can use to help break apart numbers.  Children lay out a certain number of counters and then use the Break-Apart Stick to separate the counters into two groups.

classify: Assign to categories based on one or more attributes.

combine: Put together; form one group from two or more groups.

Comparing Mat: A chart displaying two rows (or columns if used vertically) of ten square-inch boxes.  Children use the Comparing Mat to represent and compare numbers.

decade numbers: Numbers that are multiples of 10 (10, 20, 30, 40, 50, 60, 70, 80, 90).

decompose: take apart

equation: A mathematical sentence that uses an equal sign to show that two expressions, or values, are equal.

face: A flat surface of three-dimensional shape

fewer: Fewer is used to compare two quantities that can be counted.  There are 'fewer red books than blue books'.  Less is used to compare two quantities that can be measured.  'There is less water than juice.'

horizontal: Parallel to the horizon; going straight across.

known partner: one of the numbers in the equation is known and the missing number will have to e determined.

Math Mountain: A visual representation of the partners and total of a number.  The total appears at the top, and the two partners that are added to produce the total are below to the left and right.

Number Parade: A large connected sequence of numbers from 1 to 10 that is displayed permanently in the classroom.  Above each number is a 5-structured grouping of dots