power point project final
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Number LinesTRANSCRIPT
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Addition Using a Number Line
Mrs. Patty – 2nd Grade
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Before we begin….
Let’s practice our counting!
Each of you has a number card. In front of the class, organize the numbers in correct counting order!
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GREAT JOB!
You guys did a fantastic job of arranging the numbers in the correct order
Did what we put together as a class look something like this? That’s a number line!
Image from: http://etc.usf.edu/clipart/41600/41656/0-10xhalf_41656.htm
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What is a number line?
• A number line is a tool we can use to solve addition equations
• It’s another way to keep track of counting!
What are some other tools we use to help count?
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Counting With a Number LineCount along with Froggy!
Video from YouTube - http://youtu.be/M-wG4X_dYLc5
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Adding with a Number LineThis jelly bean can do it….you can too!
Video from YouTube - http://youtu.be/dI5P4MPYazE6
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Arches on a number line
A great way to keep track of your counting on a number line is to use arches to mark the start and end of your counting.
Image from - http://excelmathmike.blogspot.com/2012/05/using-number-lines-to-add-and-subtract.html
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Arches on a number line
• Starting with you pencil on zero, draw an arch counting up to the first number in the equation
• Starting from that number, count up the number line and create another arch up to the second number
• The number where your pencil lands is the answer to your addition equation! 8
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Watch and LearnMrs. Patty will show some examples up on the board
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Now it’s YOUR turn!
Using the number line paper on your desk, solve the following equations (be sure to use your arches!):
3 + 4 =
1 + 5 =
5 + 2 =
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Craft Corner!
CREATE YOUR OWN NUMBER LINE!!!!
Spend some time decorating your very own number line to use for the rest of the year!
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GREAT JOB!!
You have just learned how to solve addition equations using a number line!
Please work quietly on the worksheet that I handed out
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Resources• Math Excel Blog. (May 2012) Retrieved July 10, 2012, from
http://excelmathmike.blogspot.com/2012/05/using-number-lines-to-add-and-subtract.html• Adding Integers Using a Number Line. (n.d.) Retrieved July 10, 2012, from
http://betterlesson.com/lesson/12344/add-integers-using-number-line• Basic Adding. (n.d.) Retrieved July 10, 2012, from
http://www.brainpopjr.com/math/additionandsubtraction/basicadding/grownups.weml• Lesson Planet – Adding Using Number Lines Lesson Plans. (n.d.) Retrieved July 10, 2012, from
http://www.lessonplanet.com/search?keywords=addition+using+number+lines&media=lesson• Complabtacher (2011, October 3.) Counting 1 - 10 on the Number Line With Froggy. Retrieved July
10, 2012, from http://youtu.be/M-wG4X_dYLc• peterweatherall (2008, November 13.) Number line addition by Peter Weatherall. Retrieved July 10,
2012, from http://youtu.be/dI5P4MPYazE
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