Add and subtract whole numbers power point presentation
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Transcript of Add and subtract whole numbers power point presentation
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Add and Subtract Whole Numbers
Nicole SchalowPowerPoint Assignment
EDU653
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What are we doing here?
Today’s lesson is going to teach you how to add and subtract whole numbers.
To learn how to do this, you will watch several instructional videos and you will also get to practice on your own.
After the lesson, you should know how to add and subtract whole numbers and maybe even teach your friends how to do the same!
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Michigan GLCE’s for 2nd Grade Mathematics N.MR.02.07 Find the distance between numbers on the number line, e.g., how far is 79 from 26? N.MR.02.08 Find missing values in open sentences, e.g., 42 + ■ = 57; use relationship between addition and subtraction.
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What is a whole number?
Whole numbers are really just…numbers! (1,2,3,4,5, etc.)
BUT, whole numbers are NOT negative numbers (-5,-1,-8, etc.)
These are examples of whole numbers:
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What is a number line?
Writing numbers down on a Number Line makes it easy to tell which numbers are bigger or smaller.
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What is the difference between Natural Numbers and Whole Numbers?
"Natural Numbers" can mean either "Counting Numbers" {1, 2, 3, ...}, or "Whole Numbers" {0, 1, 2, 3, ...}, depending on the subject.
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Do you know how to add and subtract?
1 + 1 = 2
Example: If you add 2 and 3 you get 5. You would write it like this:
2 + 3 = 5
Start with 5 apples,
then subtract 2,
we are left with 3 apples.
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Learning cont..
3 + 2 = 5
2 + 3 = 5
is also..
5 + 1 = 1 + 5 = 6
7 + 11 = 11 + 7 = 18
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Practice Here!
1.)
2.) 4+3= ___
3.) -2 is a whole number. True or False?
4.) 7-2= ___
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Practice cont..
5.) 8-__= 3
6.) 2+__= 6
7.) __+ 4= 9
8.) 10- __= 2
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Please take this Practice Quiz by copy and pasting into your URL box:
http://www.mathopolis.com/questions/quiz.php
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Soccer Shootout Practice Game
http://www.funbrain.com/cgi-bin/fract.cgi?A1=s&A2=0&A15=0
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Learn more about whole numbers by watching these instructional videos!
http://www.neok12.com/video/Subtraction/zX537647720371507d665f7b.htm
http://youtu.be/a8-pAsBFXEo
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Adding and Subtracting on a number line:
The link below will take you to a page that will teach you more about number lines and how to add and subtract numbers just by looking at them!
https://learnzillion.com/lessons/677-determine-the-distance-between-integers-by-examining-absolute-value-and-number-lines
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Resources
http://www.funbrain.com/fractop/ https://www.youtube.com/watch?v=a8-pAsBFXEo http://www.neok12.com/ http://www.mathopolis.com/questions/quiz.php http://
mssmiths2ndgradeclassroom.weebly.com/quiz-practice.html
http://www.mathsisfun.com/whole-numbers.html http://
www.shutterstock.com/g/kalenikh/sets/16397-abstract-tree-with-letters-and-numbers
http://prek-8.com/1stgrade/math_addingLine1.php http://
www.k12mathworksheets.com/add-sub/Subtraction_Number_Line_Airplane.pdf