Chapter 20: Algebra: Explore Negative Numbers and Graphing

Lesson 1: Temperature: Fahrenheit. Objective: To understand Fahrenheit temperature.

Lesson 2: Temperature: Celsius. Objective: To understand Celsius temperature.

Lesson 3: Expore Negative Numbers. Objective: To locate and name negative numbers by using a number line and counting techniques.

Lesson 4: Problem Solving Skill: Make Generalizations. Objective: To solve problems by using the skill *make generalizations*.

Lesson 5: Explore Inequalities. Objective: To find whole numbers that make an inequality true.

Lesson 6: Use a Coordinate Grid. Objective: To locate points on a coordinate grid.

Vocabulary: zero, number line, degrees Fahrenheit, degrees Celsius, negative numbers, positive numbers, opposites, inequality, ordered pair, x-axis, y-axis, x-coordinate, y-coordinate

**zero:** none

**number line:** a line with equally-spaced marks named by numbers

**degrees Fahrenheit:** a standard unit for measuring temperature in the customary system

**degrees Celsius: **a standard unit for measuring temperature in the metric system

**negative numbers:** all the numbers to the left of zero on the number line

**positive numbers:** all the numbers to the right of zero on a number line

**opposites: **integers that are the same distance, but in opposite directions, from zero on a number line

**inequality: **a number sentence that shows two quantities are not equal

**ordered pair: **a pair of numbers used to locate a point on a coordinate grid

**x-axis:** the horizontal line on a coordinate grid

**y-axis: **the vertical line on a coordinate grid

**x-coordinate: **the first number in an ordered pair that tells the distance to move horizontally

**y-coordinate: **the second number in an ordered pair that tells the distance to move vertically

Our textbook website: www.harcourtschool.com

Some good practice websites:

http://www.gamequarium.com/placevalue.html

http://www.softschools.com/math/games/

www.multiplication.com

www.funbrain.com