Summary of Knowledge:
Students should identify negative and positive numbers.
Students should identify the value of positive, negative, and rational numbers in order to place them on a number line.
Students should be able to know the relationship between positive or negative numbers and their opposites.
Key Vocabulary:
Negative Numbers: A number less than 0. On a number line, negative numbers are located to the left of 0. On a vertical number line, negative numbers are located below 0.
Positive Numbers: A number greater than 0. 0 is neither positive nor negative. On a number line, positive numbers are located to the right of 0. On a vertical number line, positive numbers are located above 0.
Opposites: Two numbers whose sum is 0. For example: -3 and 3 are opposites. On a number line, opposites are the same distance from 0, but in different directions from 0. The number 0 is its own opposite.
Integers: The whole numbers and their opposites. 0 is an integer, but is neither positive nor negative.
Rational Numbers: numbers that can be expressed as a quotient of 2 integers where a divisor is not 0.
Task Analysis of how to Place Numbers on the Number Line:
Examples :
Kate and brad have a project of measuring the temperature in the Sahara desert on their new film. They recorded these temperatures : 40 , 20 , 0 , -20 , -40. Do a number line and plot the temperatures in it.
Juanes is doing a number line and which he has to record the numbers : -2,0,2,4,-4. Do a number line , and plot the numbers.
Web References :
Web References :
http://www.helpingwithmath.com/resources/oth_number_lines.htm
www.funbrain.com/linejump/index.html
www.mathsisfun.com/number-line.html
By Juan Andres Zepeda and Nicolas Chavez
No comments:
Post a Comment